研究者詳細 - 金岡　鐘局

論文 - 金岡　鐘局

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Multiarm Star-Crosslinked Hydrogel: Polymer Network with Thermoresponsive Free-End Chains Densely Connected to Crosslinking Points 招待査読国際誌

Shohei Ida*, Shogo Toda, Masatoshi Oyama, Hiroki Takeshita, Shokyoku Kanaoka*

Macromolecular Rapid Communication 42 ( 8 ) 2000558 2021年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Wiley 参加形態：共同（主担当）

Soft tissue in biological system is a hydrogel with elaborate structure exhibiting repeatable dynamic function. In order to approach such sophisticated system, precise construction of a designed network with multi‐components is desired. This communication presents a novel hydrogel having highly dense stimuli‐responsive free‐end chains around crosslinking structure. A key molecule is a core‐crosslinked star‐shaped polymer with multiple thermoresponsive arms, which can be prepared by reversible addition–fragmentation chain transfer polymerization of divinyl crosslinker with poly(N‐isopropylacrylamide) (PNIPAAm) macro‐chain transfer agent and have a number of unreacted carbon–carbon double bonds in the core. These unreacted double bonds can be utilized as a crosslinker for poly(acrylamide) (PAAm) gel synthesis by free radical polymerization. The obtained gel contains homogeneously dispersed star PNIPAAms as crosslinking points and exhibits thermoresponsive swelling behavior in water depending on the star contents. In particular, the gel with low content of the star crosslinker shows localized responsive behavior with expansion and shrinkage of the star in one molecule. The mechanical properties of the star‐crosslinked gel are significantly high compared to the conventional PAAm gels particularly in compressive strength (≈9 MPa). Moreover, the star‐crosslinked gel has thermoresponsive mechanical toughening property.

DOI： 10.1002/marc.202000558

その他リンク： https://onlinelibrary.wiley.com/doi/10.1002/marc.202000558

Facile synthesis of macroscopic bilayer gels by one-shot radical polymerization in phase-separated binary solvent systems 招待招待査読国際誌

Shohei Ida*, Ryuto Soma, Iori Ono, Takumitsu Kida, Shokyoku Kanaoka*

Polymer Journal accepted 2025年

Facile synthesis of acrylamide derivative copolymers with side urethane groups for systematic variation of the thermoresponsive behavior 査読国際誌

Shohei Ida*, Ryu Hashiguchi, Yusuke Murai, Kaito Nakamura, Kazuki Yano, Shokyoku Kanaoka*

Polymer Journal 56 ( 8 ) 735 - 743 2024年8月

Solution Properties of Amphiphilic Alternating Copolymers of N-Ethylmaleimide and 2-Hydroxyethyl Vinyl Ether: Thermoresponsiveness in Alcohols and Cosolvency Phenomenon in Binary Ethanol/Water Solutions 査読国際誌

Kaito Nakamura, Kazuki Yano, Shohei Ida*, Daichi Ida*, Akiyuki Ryoki, Shunichiro Yamamoto, Takaya Terashima, Shokyoku Kanaoka*

Macromolecules 57 ( 9 ) 4439 - 4447 2024年5月

Temperature-Induced Nanostructure Formation Behavior of Core Cross-Linked Star-Shaped Poly(N-isopropylacrylamide) in Water 査読

Ken Terao*, Masahiro Abe, Masafumi Nagase, Sayuri Takeshima, Shohei Ida, and Shokyoku Kanaoka*

Macromolecules 56 ( 14 ) 5635 - 5641 2023年7月

Thermoresponsive “Irreversible” Property Change of POSS-Crosslinked PNIPAAm Hydrogels 招待査読

Shohei Ida*, Tenki Hikida, Atsumi Kawai, Tomonari Matsuda, Souma Suzuki, Hiroaki Imoto, Kensuke Naka, Shokyoku Kanaoka*

Polymer Chemistry 14 ( 23 ) 2771 - 2778 2023年6月

Structure–property correlation of crosslinked domain hydrogels exhibiting thermoresponsive mechanical toughening and hybridization with photoluminescent carbon dots 査読

Shohei Ida, Takahiro Okuno, Miki Morimura, Kazumasa Suzuki, Hiroki Takeshita, Masatoshi Oyama, Keiji Nakajima, Shokyoku Kanaoka

Polymer Chemistry 13 ( 23 ) 3479 - 3488 2022年6月

pH-responsive aggregation control of multiarm star polymers depending on the ionic segment sequence of arm polymers 査読

Kitajima H., Ida S., Bhowmik S., Yusa S.i., Kanaoka S.

Polymer Journal 2022年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Polymer Journal

A deep understanding of the effect of the ionic density in a polymer on the solution properties would contribute to the development of novel stimuli-responsive materials. To this end, a multibranched and highly dense structure is an attractive platform for the accumulation of ionizable groups. In this study, we focus on core-crosslinked multiarm star polymers having ionizable poly(acrylic acid) (PAA) segments in the arms with different sequences to evaluate the density effect of ionic segments on pH-responsive properties. Two types of star polymers with a PAA block on the outer or inner side of an arm chain in combination with a hydrophilic poly(2-hydroxyethyl acrylate) (PHEA) block were synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization. These star polymers exhibited aggregation behavior different from the corresponding linear block polymer in an acidic aqueous solution. Dynamic light scattering analysis in water revealed that the star polymer with PAA in the outer layer formed larger aggregates than the star polymer with the inverse layer structure, and the pH-responsive change of the hydrodynamic radius in water depends on the sequence in the arm polymers. This behavior resulted from the balance of hydrogen bonding between PAA and PHEA segments and PAA electrostatic repulsion.

DOI： 10.1038/s41428-022-00621-3

Scopus

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Thermoresponsive Property of Polymer Hydrogels Induced by Copolymerization of Hydrophilic and Hydrophobic Monomers: Comprehensive Study from Monomer Sequence and Water Affinity 査読国際誌

Shohei Ida*, Daiki Nishisako, Ayaka Fujiseki, Shokyoku Kanaoka*

Soft Matter 17 ( 25 ) 6063 - 6072 2021年7月

Design of Hydrogels with Thermoresponsive Crosslinked Domain Structures via the Polymerization-Induced Self-Assembly Process and Their Thermoresponsive Toughening in Air 査読国際誌

Morimura M., Ida S., Oyama M., Takeshita H., Kanaoka S.

Macromolecules 54 ( 4 ) 1732 - 1741 2021年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Macromolecules 参加形態：共同（副担当）

We designed a hydrogel with a thermoresponsive crosslinked domain (CD) structure, which expressed thermoresponsive toughening in an isochoric manner in air. The responsive behavior of conventional thermoresponsive hydrogels is usually a macroscopic volume change along with water transfer to and from the outside of the polymer network. In order to expand the scope of thermoresponsive hydrogels, a network design that requires no external water for thermoresponsive transition has been demanded. To this end, we focused on the polymerization-induced self-assembly process for the direct synthesis of gels with designed domains and performed reversible addition-fragmentation chain transfer polymerization of N-isopropylacrylamide in water at a high temperature using a bifunctional macro-chain transfer agent, yielding a transparent gel. The structural analysis of the obtained gel revealed that dispersed CDs reversibly swelled and shrunk in response to temperature change in air without aggregation. Such an internal structural change induced the increase of elastic modulus and elongation at a high temperature.

DOI： 10.1021/acs.macromol.0c02569

Scopus

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pH- and thermo-responsive behavior of PNIPAM star containing terminal carboxy groups in aqueous solutions 査読国際誌

Sharker K.K., Takeshima S., Toyama Y., Ida S., Kanaoka S., Yusa S.

Polymer 203 122735 2020年7月

Supramolecularly Designed Thermoresponsive Polymers in Different Polymer Backbones 査読

Naya M., Kokado K., Landenberger K., Kanaoka S., Aoshima S., Sada K.

Macromolecular Chemistry and Physics 2020年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Macromolecular Chemistry and Physics

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Thermoresponsive polymers in water, for example, poly(N-isopropylacrylamide) (PNIPAM) are investigated extensively, due to a wide range of biomedical applications. However, the attempts to control thermoresponsiveness are still rare in less or nonpolar media. Herein, the three thermoresponsive homopolymers tethering an N-butylurea group in the side chain with a different polymer backbone are reported. They exhibit lower critical solution temperature (LCST)-type and upper critical solution temperature (UCST)-type thermoresponsiveness depending on association of the urea group in the polymer chain and hydrogen bonding small molecules (effectors) in ternary systems (polymer/effector/organic solvent). The difference of polymer backbone appears as their change of solvophobicity in organic solvents. Poly(methacrylate) backbone needs more amount of the effector in nonpolar organic solvents, and poly(vinyl ether) backbone needs more amount in polar organic solvents. However, the influence of polymer backbone is too little to change the phase transition behavior, and the thermoresponsiveness is dominated by association and dissociation of hydrogen bondings between polymers and effectors. The supramolecular design of the thermoresponsive polymers is strong and extensible for the design of their phase transitions.

DOI： 10.1002/macp.201900455

Scopus

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Thermoresponsive core cross-linked star-shaped poly(N-isopropylacrylamide) for reversible and controlled aggregation of nanoscale molecular units 査読国際誌

Ida S., Toyama Y., Takeshima S., Kanaoka S.

Polymer Journal 2019年11月

Swelling and mechanical properties of thermoresponsive/hydrophilic conetworks with crosslinked domain structures prepared from various triblock precursors 査読国際誌

Ida S., Morimura M., Kitanaka H., Hirokawa Y., Kanaoka S.

Polymer Chemistry 10 ( 45 ) 6122 - 6130 2019年10月

Facile one‐shot synthesis of functional star‐shaped polymers by domino‐type living cationic copolymerization 査読国際誌

Mayuka Yamada, Arihiro Kanazawa, Shokyoku Kanaoka, Sadahito Aoshima

Journal of Polymer Science: Part A, Polymer Chemistry 57 ( 21 ) 2166 - 2174 2019年9月

Dual stimuli-responsive copolymers with precisely arranged degradable units: Synthesis by controlled alternating copolymerization of oxyethylene-containing vinyl ethers and conjugated aldehydes 査読

Matsumoto S., Kanazawa A., Kanaoka S., Aoshima S.

Polymer Chemistry 10 ( 30 ) 4134 - 4141 2019年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Polymer Chemistry 参加形態：共同（副担当）

© 2019 The Royal Society of Chemistry. Thermoresponsive alternating, block, and gradient-like copolymers with acid-degradability were synthesized via controlled cationic copolymerization of conjugated aldehydes and vinyl ethers (VEs). The thermoresponsive behavior of the resultant copolymers in water was governed by the polymer sequence. For example, an alternating copolymer was soluble in water at low temperature and displayed a sharp one-step phase separation on heating. By contrast, a block copolymer consisting of a degradable alternating sequence and a VE homosequence exhibited two-step phase separation in water. The alternating copolymers contained acid-labile acetal linkages in the main chain at periodic intervals and thus decomposed rapidly into small molecules without residual oligomers under acidic conditions. The block and gradient-like copolymers were hydrolyzed into VE polymers and oligomers, respectively, due to the presence of non-degradable VE-VE linkages. The thermoresponsive patterns of the hydrolysis products differed from those of the original polymers.

DOI： 10.1039/c9py00513g

Scopus

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Screening of metal complex catalysts using bidentate Schiff base ligands for controlled cationic polymerization of vinyl ethers using: In situ complexation method 査読

Kigoshi S., Kanazawa A., Kanaoka S., Aoshima S.

Polymer Chemistry 10 ( 30 ) 4209 - 4219 2019年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Polymer Chemistry 参加形態：共同（副担当）

© 2019 The Royal Society of Chemistry. Various ligands were screened for the cationic polymerization of isobutyl vinyl ether (IBVE) via in situ complexation using ZrCl4 as a catalyst precursor. [N,O]-Type phenoxyimine ligand frameworks were found to be more efficient for controlled polymerization compared to ligands that coordinate to the metal via two oxygen ([O,O]-type ligands) or two nitrogen ([N,N]-type ligands) atoms. In particular, the N-aryl phenoxyimine ligand with tBu groups on the phenol moiety was effective in terms of the controllability of the polymerization, catalyst solubility, catalytic activity, and ease of derivatization. Moreover, optimization of reaction conditions led to the expansion of the applicable metal species for controlled cationic polymerization. The polymerization of IBVE using the N-phenyl phenoxyimine ligand/TiCl4 initiating system in the absence of ethyl acetate in toluene at -78 °C produced a well-controlled polymer. In addition, the phenoxyimine/ZrCl4 systems were effective for the controlled polymerization of various monomers including St derivatives. The easily tunable electronic properties were also useful for the controlled bulk polymerization.

DOI： 10.1039/c9py00351g

Scopus

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Biomineralization-inspired fabrication of chitosan/calcium carbonates core-shell type composite microparticles as a drug carrier 査読

Tanimoto S., Nishii I., Kanaoka S.

International Journal of Biological Macromolecules 129 659 - 664 2019年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：International Journal of Biological Macromolecules 参加形態：共同（副担当）

© 2019 Elsevier B.V. Chitosan/calcium carbonate core-shell type composite microparticles were fabricated via a biomineralization-inspired process with chitosan particles as starting materials. The obtained composite particles were spherical, and the diameter of the composite particles was larger than that of the chitosan particles. XRD measurement indicated that the shell of the composite particle had a crystalline structure. The shell fabrication process was carried out with polyacrylic acid (PAA) or polyglutamic acid (PGlu) as binder molecules between calcium carbonate and chitosan. The crystal form of the shell fabricated with PAA was calcite, which is the most stable form of calcium carbonate crystal. On the other hand, the shell fabricated with PGlu was composed mainly with vaterite crystal, which is not a stable form. Types of the binder molecules influenced the crystal structure of the calcium carbonate shell. Drug release behavior of the model drug-introduced core-shell particles was evaluated in various pH conditions. It was revealed that the inorganic shell suppressed drug release and that the crystal form of the calcium carbonate shell affected suppression of drug release. The core-shell particles prepared in this study was an environmentally friendly hybrid product consisting of inorganic and organic materials and could be used as a novel drug-carrying microcapsule.

DOI： 10.1016/j.ijbiomac.2019.02.063

Scopus

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Controlled Cationic Polymerization of 1-Methoxy-1,3-Butadiene: Long-Lived Species-Mediated Reaction and Control over Microstructure with Weak Lewis Bases 査読

Togo Y., Kanazawa A., Kanaoka S., Aoshima S.

Journal of Polymer Science, Part A: Polymer Chemistry 57 ( 3 ) 288 - 296 2019年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Polymer Science, Part A: Polymer Chemistry 参加形態：共同（副担当）

© 2018 Wiley Periodicals, Inc. Controlled cationic polymerization of trans-1-methoxy-1,3-butadiene was achieved through the design of appropriate initiating systems, yielding soluble polymers with controllable molecular weights. The combined use of SnCl4 or GaCl3 as a Lewis acid catalyst and a weak Lewis base in conjunction with HCl as a protonogen resulted in efficient and controlled polymerization. The Mn values of the product polymers increased linearly along the theoretical line, which indicates that intermolecular crosslinking reactions negligibly occurred. In addition, the polymer microstructure was critically dependent on the weak Lewis base employed. In particular, the use of tetrahydrofuran as an additive resulted in the highest 4,1/4,3-structure ratio (96/4). Weak Lewis bases also affected the polymerization rates but exhibited unique trends that differed from their effects on the cationic polymerization of alkyl vinyl ethers. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 288–296.

DOI： 10.1002/pola.29090

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Tetradentate Schiff Base Ligand/MCl <inf>n</inf> Initiating Systems for the Controlled Cationic Polymerization of Isobutyl Vinyl Ether: Effects of the Ligand Framework 査読

Kigoshi S., Kanazawa A., Kanaoka S., Aoshima S.

Journal of Polymer Science, Part A: Polymer Chemistry 2019年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Polymer Science, Part A: Polymer Chemistry 参加形態：共同（副担当）

© 2019 Wiley Periodicals, Inc. We investigated the cationic polymerization of vinyl ethers using metal complex catalysts with salen and salphen ligands. Metal complexes were generated in situ from the reaction of a ligand and a metal chloride. The choice of a ligand and a central metal was crucial for tuning the catalyst function such as catalytic activity and controllability of the polymerization. Among metal chlorides employed, ZrCl 4 was the most efficient for controlled polymerization. Cationic polymerization of isobutyl vinyl ether (IBVE) proceeded using the salen and salphen-type ligand/ZrCl 4 initiating systems, yielding polymers with predetermined molecular weights and narrow molecular weight distributions. Importantly, the structural effects of the complex catalysts were responsible for the polymerization behavior. For example, the polymerization using the salen-type ligand/ZrCl 4 system was much slower than that using the salphen-type ligand/ZrCl 4 system. In addition, the polymerization of IBVE using the salen-type ligand/FeCl 3 system proceeded in a controlled manner, which was in contrast to uncontrolled polymerization using the salphen-type ligand/FeCl 3 system. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019.

DOI： 10.1002/pola.29354

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Structure–property relationship of phenoxyimine ligands/metal chloride initiating systems for controlled cationic polymerizations of alkyl vinyl ethers 査読

Kigoshi S., Kanazawa A., Kanaoka S., Aoshima S.

Journal of Polymer Science, Part A: Polymer Chemistry 2019年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Polymer Science, Part A: Polymer Chemistry 参加形態：共同（副担当）

© 2019 Wiley Periodicals, Inc. The catalyst structure–property relationships of the phenoxyimine complexes in controlled cationic polymerization of vinyl ethers were investigated based on the Hammett correlation. The correlation analyses of a series of experiments using the phenoxyimine ligands/TiCl4 initiating systems indicated that the substituents on the N-aryl phenoxyimine ligands affected the polymerization rate and stereoselectivity. Importantly, a linear correlation was observed between the Hammett substituent constants and the polymerization rates, which indicates that the Lewis acidity of the complex is affected by the electron-withdrawing and -donating effects of the substituents. The tacticity of product polymers correlated to the Hammett substituent constants. Unlike the relationship with the polymerization rates, the σ– values, which account for the enhanced resonance effects, were more appropriate for the relationship with the tacticity than the normal σ values. In contrast, the polymerization behavior using o-substituted ligands exhibited a trend different from those using p- or m-substituted ligands. The structural change, which was caused by the rotation of the CN bonding, most likely triggered the acceleration effect in the case of the o-substituents. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019.

DOI： 10.1002/pola.29458

Scopus

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Swelling Properties of Thermoresponsive/Hydrophilic Co-networks with Functional Crosslinked Domain Structures 招待査読国際誌

Shohei Ida*, Hironobu Kitanaka, Tatsuya Ishikawa, Shokyoku Kanaoka, Yoshitsugu Hirokawa

Polymer Chemistry 9 ( 13 ) 1701 - 1709 2018年4月

Precision Synthesis of Polylactide-Based Thermoresponsive Block Copolymers via Successive Living Cationic Polymerization of Vinyl Ether and Ring-Opening Polymerization of Lactide 査読

Seki Y., Kanazawa A., Kanaoka S., Fujiwara T., Aoshima S.

Macromolecules 51 ( 3 ) 825 - 835 2018年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Macromolecules 参加形態：共同（副担当）

© 2018 American Chemical Society. A new class of polylactide (PLA)-based block copolymers with thermoresponsive poly(vinyl ether) [poly(VE)] were precisely synthesized via successive living cationic polymerization of VE and ring-opening polymerization of lactide (LA). The synthetic route starts with precise end-functionalization of poly(VE) by living cationic polymerization to produce a macroinitiator having a hydroxy group at the α- and/or -end for ring-opening polymerization of LA. End-functionalized polymers of 2-methoxyethyl VE (MOVE) with highly controlled structures were obtained by either an initiation or a termination method under optimized conditions. Subsequent ring-opening polymerization of LA from the hydroxy group of the macroinitiator yielded block copolymers with well-defined structures. The obtained block copolymers were demonstrated to exhibit a thermoresponsive solubility transition in water; this transition was induced by the thermosensitivity of the poly(MOVE) segments. The transition between micelle-like aggregates and phase separation was reversible with a shorter PLA chain, whereas irreversible precipitation was observed with a longer PLA segment. The permanent precipitation upon heating is most likely attributable to crystalline formation of the longer PLA segments. The solution and bulk properties of the block copolymers with enantiomeric PLA were also governed by stereocomplex formation between poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA) segments.

DOI： 10.1021/acs.macromol.7b02329

Scopus

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Synthesis of Highly Defined Graft Copolymers Using a Cyclic Acetal Moiety as a Two-Stage Latent Initiating Site for Successive Living Cationic Polymerization and Ring-Opening Anionic Polymerization 査読

Yokoyama N., Kanazawa A., Kanaoka S., Aoshima S.

Macromolecules 51 ( 3 ) 884 - 894 2018年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Macromolecules 参加形態：共同（副担当）

© 2018 American Chemical Society. The synthesis of well-defined graft copolymers with designed intervals between branches was achieved using cyclic acetal moieties as two-stage latent initiating sites. A cyclic acetal was shown to initiate the living cationic polymerization of vinyl ethers (VEs), yielding a polymer with a hydroxy group at the α-end derived from the cyclic acetal. The newly generated hydroxy group was able to efficiently induce the subsequent ring-opening anionic polymerization of l-lactide (LLA), and a diblock copolymer with a narrow molecular weight distribution (MWD) was obtained. For the synthesis of a graft copolymer, a five-membered cyclic acetal moiety was introduced at the Ï‰-chain ends of poly(VE)s, which was employed as the initiating site for the living cationic polymerization of VEs. Repeated polymerization and acetalization generated a macroinitiator with several hydroxy groups on the side chain of a poly(VE) backbone. Graft copolymers possessing branches with narrow MWDs and regular spaces between the branches were synthesized by the ring-opening polymerization of LLA using this macroinitiator.

DOI： 10.1021/acs.macromol.7b02622

Scopus

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Aggregation of cationic amphiphilic block and random copoly(vinyl ether)s with antimicrobial activity 査読

Oda Y., Yasuhara K., Kanaoka S., Sato T., Aoshima S., Kuroda K.

Polymers 10 ( 1 ) 2018年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Polymers

© 2018 by the authors. In this study, we investigated the aggregation behaviors of amphiphilic poly(vinyl ether)s with antimicrobial activity. We synthesized a di-block poly(vinyl ether), B3826, composed of cationic primary amine and hydrophobic isobutyl (iBu) side chains, which previously showed antimicrobial activity against Escherichia coli. B3826showed similar uptake behaviors as those for a hydrophobic fluorescent dye, 1,6-diphenyl-1,3,5-hexatriene, to counterpart polymers including homopolymer H44 and random copolymer R4025, indicating that the iBu block does not form strong hydrophobic domains. The cryo-TEM observations also indicated that the polymer aggregate of B3826appears to have low-density polymer chains without any defined microscopic structures. We speculate that B3826formed large aggregates by liquid-liquid separation due to the weak association of polymer chains. The fluorescence microscopy images showed that B3826bonds to E. coli cell surfaces, and these bacterial cells were stained by propidium iodide, indicating that the cell membranes were significantly damaged. The results suggest that block copolymers may provide a new platform to design and develop antimicrobial materials that can utilize assembled structures and properties.

DOI： 10.3390/polym10010093

Scopus

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Precision synthesis of degradable alternating copolymers of fluorine-containing vinyl ethers and conjugated aldehydes 査読

Matsumoto S., Kanazawa A., Kanaoka S., Aoshima S.

Kobunshi Ronbunshu 74 ( 6 ) 608 - 615 2017年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Kobunshi Ronbunshu 参加形態：共同（副担当）

© 2017, The Society of Polymer Science, Japan. Degradable alternating copolymers with distinctly fluorous characteristics were synthesized via controlled cationic copolymerization of perfluoroalkyl vinyl ethers (VEs) and conjugated aldehydes. Well-defined alternating copolymers were obtained using the EtSO3H/GaCl3 initiating system in the presence of 1,4-dioxane as an added base and 2,6-di-tert-butylpyridine as a proton trap in a fluorine solvent at -78°C. Various conjugated aldehydes and fluorine-containing VEs were also investigated for controlled alternating cationic copolymerization. The solubility of the obtained alternating copolymers improved compared to the fluorine-containing VE homopolymer. In particular, copolymers underwent upper critical solution temperature-type phase separation behavior in various solvents. In addition, polymer thin films of the alternating copolymers exhibited high water and oil repellency. All alternating copolymers were decomposed into small molecules under an acidic condition without residual oligomers in both solution and thin film state.

DOI： 10.1295/koron.2017-0032

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Tandem Reaction of Cationic Copolymerization and Concertedly Induced Hetero-Diels–Alder Reaction Preparing Sequence-Regulated Polymers 査読国際誌

Suzuka Matsumoto, Arihiro Kanazawa, Shokyoku Kanaoka, Sadahito Aoshima

Journal of the American Chemical Society 139 ( 23 ) 7713 - 7716 2017年6月

Biphasic Synthesis of “Block” Copolymers and Star-Shaped Polymers via Monomer-Selective Cationic Copolymerization inOrganic/Fluorinated Solvents 査読

Mayuka Yamada, Tsuyoshi Nishikawa, Arihiro Kanazawa, Shokyoku Kanaoka, Sadahito Aoshima

Journal of Polymer Science, Part A: Polymer Chemistry 54 ( 17 ) 2656 - 2661 2016年9月

Cationic Polymerization of Vinyl Ethers with Alkyl or Ionic Side Groups in Ionic Liquids 査読国際誌

H. Yoshimitsu, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 54 ( 12 ) 1774 - 1784 2016年6月

Design of Blood-Compatible Interfaces with Poly(vinyl ether)s 査読国際誌

Y. Oda, C. Zhang, D. Kawaguchi, H. Matsuno, S. Kanaoka, S. Aoshima, K. Tanaka

Advanced Materials Interfaces 3 2016年5月

Shape-Switching Self-Assembly of New Diblock Copolymers with UCST-type and LCST-type Segments in Water 査読国際誌

H. Yoshimitsu, E. Korchagina, A. Kanazawa, S. Kanaoka, F. M. Winnik, S. Aoshima

Polymer Chemistry 7 ( 11 ) 2062 - 2068 2016年3月

Quantitative and Ultrafast Synthesis of Well-Defined Star-Shaped Poly(p-Methoxystyrene) via One-Pot Living Cationic Polymerization 査読国際誌

T. Yoshizaki, A. Kanazawa, S. Kanaoka, S. Aoshima

Macromolecules 49 ( 1 ) 71 - 79 2016年1月

Synthesis of Block or Graft Copolymers Containing Poly(Styrene Derivatives) Segments by Living Cationic Polymerization Using Acetal Moieties as Latent Initiating Sites 査読国際誌

N. Yokoyama, H. Yoshida, A. Kanazawa, S. Kanaoka, S. Aoshima

Polymer Chemistry 6 ( 35 ) 6316 - 6324 2015年9月

含フッ素セグメントをもつブロックコポリマーの精密合成および水/有機層間を往復可能な高分子ミセルの創製査読

山中悠司、金澤有紘、金岡鐘局、青島貞人

高分子論文集 72 ( 7 ) 480 - 485 2015年7月

ビニルエーテルとスチレン類を有する新規ブロックポリマーの精密合成および高感度温度応答性フィルムの創製査読

吉﨑友哉、金澤有紘、金岡鐘局、青島貞人

高分子論文集 72 ( 7 ) 486 - 490 2015年7月

Sequence-Controlled Degradable Polymers by Controlled Cationic Copolymerization of Vinyl Ethers and Aldehydes: Precise Placement of Cleavable Units at Predetermined Positions 査読国際誌

M. Kawamura, A. Kanazawa, S. Kanaoka, S. Aoshima

Polymer Chemistry 6 ( 22 ) 4102 - 4108 2015年6月

Controlled Radical Polymerization of Styrene with Magnetic Iron Oxides Prepared through Hydrothermal, Bioinspired, and Bacterial Processes 査読国際誌

A. Kanazawa, K. Satoh, S. Kanaoka, et al.

RSC Advances 5 ( 64 ) 51122 - 51129 2015年6月

Density Profiles of Well-Defined Poly(methyl 2-propenyl ether) (PMPE) near Water Interface 査読国際誌

Y. Oda, D. Kawaguchi, T. Hirata, N. L. Yamada, S. Kanaoka, S. Aoshima, K. Tanaka

Macromolecular Symposia 350 ( 1 ) 99 - 104 2015年4月

New Initiating Systems for Cationic Polymerization of Plant-Derived Monomers: GaCl₃/Alkylbenzene-Induced Controlled Cationic Polymerization of β-Pinene 査読国際誌

Y. Karasawa, M. Kimura, A. Kanazawa, S. Kanaoka, S. Aoshima

Polymer Journal 47 ( 2 ) 152 - 157 2015年2月

Dynamic-driven Surface Segregation of a Hydrophilic Component in Diblock Copolymer Films 査読国際誌

C. Zhang, Y. Oda, D. Kawaguchi, S. Kanaoka, S. Aoshima, K. Tanaka

Chemistry Letters 44 ( 2 ) 166 - 168 2015年2月

In Situ and Readily Prepared Metal Catalysts and Initiator for Living Cationic Polymerization of Isobutyl Vinyl Ether: Dual-Purpose Salphen as a Ligand Framework for ZrCl₄ and an Initiating Proton Source 査読国際誌

S. Kigoshi, A. Kanazawa, S. Kanaoka, S. Aoshima

Polymer Chemistry 6 ( 1 ) 30 - 34 2015年1月

Alkoxyoxirane, a Unique Cyclic Monomer: Controlled Cationic Homopolymerization Mediated by Long-Lived Species and Copolymerization with Vinyl Ether via Alkoxy Group Transfer 査読国際誌

A. Kanazawa, S. Kanda, S. Kanaoka, S. Aoshima

Macromolecules 47 ( 24 ) 8531 - 8540 2014年12月

Rational Design of Oxirane Monomers for Efficient Crossover Reactions in Concurrent Cationic Vinyl-Addition and Ring-Opening Copolymerization with Vinyl Ethers 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Macromolecules 47 ( 19 ) 6635 - 6644 2014年10月

Controlled Cationic Alternating Copolymerization of Various Enol Ethers and Benzaldehyde Derivatives: Effects of Enol Ether Structures 査読国際誌

Y. Ishido, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 52 ( 9 ) 1334 - 1343 2014年5月

Design of Benign Initiator for Living Cationic Polymerization of Vinyl Ethers: Facile In Situ Generation of Vinyl Ether–Hydrogen Halide Adducts and Subsequent Controlled Polymerization without a Lewis Acid Catalyst 査読国際誌

A. Kanazawa, R. Hashizume, S. Kanaoka, S. Aoshima

Macromolecules 47 ( 5 ) 1578 - 1585 2014年3月

Effect of Side-chain Carbonyl Groups on the Interface of Vinyl Polymers with Water 査読国際誌

Y. Oda, A. Horinouchi, D. Kawaguchi, H. Matsuno, S. Kanaoka, S. Aoshima, K. Tanaka

Langmuir 30 ( 5 ) 1215 - 1219 2014年2月

Efficient Design for Stimuli-Responsive Polymers with Quantitative Acid-Degradability: Specifically Designed Alternating Controlled Cationic Copolymerization and Facile Complete Degradation 査読国際誌

S. Aoshima, Y. Oda, S. Matsumoto, Y. Shinke, A. Kanazawa, S. Kanaoka

ACS Macro Letters 3 ( 1 ) 80 - 85 2014年1月

Chemically Recyclable Alternating Copolymers with Low Polydispersity from Conjugated/Aromatic Aldehydes with Vinyl Ethers: Selective Degradation to Another Monomer at Ambient Temperature 査読国際誌

Y. Ishido, A. Kanazawa, S. Kanaoka, S. Aoshima

Polymer Chemistry 5 ( 1 ) 43 - 47 2014年1月

Size-Controlled Preparation of Gold Nanoclusters Stabilized by High Viscosity Hydrophilic Polymers Using a Microflow Reactor 査読国際誌

S. Haesuwannakij, W. Karuehanon, V. L. Mishra, H. Kitahara, H. Sakurai , S. Kanaoka, S. Aoshima

Monatshefte für Chemie 145 ( 1 ) 23 - 28 2014年1月

Precise Synthesis of pH-Responsive Copolymers with Naphthoic Acid Side Groups via Living Cationic Polymerization 査読国際誌

Y. Shinke, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 51 ( 24 ) 5239 - 5247 2013年12月

Living Cationic Polymerization of Vinylnaphthalene Derivatives 査読国際誌

Y. Shinke, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 51 ( 22 ) 4828 - 4834 2013年11月

Precision Synthesis of Graft Copolymers via Living Cationic Polymerization of p-Acetoxystyrene Followed by Friedel-Crafts-Type Termination Reaction 査読国際誌

Y. Shinke, H. Yamamoto, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 51 ( 21 ) 4675 - 4683 2013年11月

Selectively Degradable Alternating Copolymers of Isobutyl Vinyl Ether and Plant-Derived Aldehydes with Acyclic Side Chains: Effects of Side Group Structures on Copolymerization Behaviors 査読国際誌

Y. Ishido, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 51 ( 21 ) 4684 - 4693 2013年11月

Concurrent Cationic Vinyl-Addition and Ring-Opening Copolymerization Using B(C₆F₅)₃ as a Catalyst: Copolymerization of Vinyl Ethers and Isobutylene Oxide via Crossover Propagation Reactions 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of the American Chemical Society 135 ( 25 ) 9330 - 9333 2013年6月

Living Cationic Polymerization of Vinyl Ethers with a Naphthyl Group: Decisive Effect of the Substituted Position on Naphthalene Ring 査読国際誌

Y. Shinke, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 50 ( 24 ) 5041 - 5048 2012年12月

Well-Defined Polymeric Ionic Liquids with an Upper Critical Solution Temperature in Water 査読国際誌

H. Yoshimitsu, A. Kanazawa, S. Kanaoka, S. Aoshima

Macromolecules 45 ( 23 ) 9427 - 9434 2012年12月

Domino Synthesis of Star-Shaped Polymers Based on Monomer Selective Living Cationic Polymerization: Highly Controlled Star Polymer Formation 査読国際誌

S. Kanaoka, M. Yamada, J. Ashida, A. Kanazawa, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 50 ( 22 ) 4594 - 4598 2012年11月

Cationic Addition Polymerization of 1,4-Dioxene Using GaCl₃ as Lewis Acid Catalyst: Long-Lived Species-Mediated Polymerization 査読国際誌

K. Uchigami, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 50 ( 21 ) 4571 - 4578 2012年11月

Structure Effects of Lewis Acids on the Living Cationic Polymerization of p-Methoxystyrene: Distinct Difference in Polymerization Behavior from Vinyl Ethers 査読国際誌

A. Kanazawa, S. Shibutani, N. Yoshinari, T. Konno, S. Kanaoka, S. Aoshima

Macromolecules 45 ( 19 ) 7749 - 7757 2012年10月

Biologically Synthesized or Bioinspired Process-Derived Iron Oxides as Catalysts for Living Cationic Polymerization of Vinyl Ether 査読国際誌

A. Kanazawa, S. Kanaoka, N. Yagita, Y. Oaki, H. Imai, M. Oda, A. Arakaki, T. Matsunaga, S. Aoshima

Chemical Communications 48 ( 88 ) 10904 - 10906 2012年10月

Precise Synthesis of End-Functionalized Thermosensitive Poly(vinyl ether)s by Living Cationic Polymerization 査読国際誌

H. Shimomoto, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 50 ( 19 ) 4137 - 4144 2012年10月

Synthesis of Graft Copolymers Based on Selective Living Cationic Polymerization Using an Acetal Group with a Com-bination of Lewis Acids 査読国際誌

H. Shimomoto, H. Yoshida, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 50 ( 18 ) 3703 - 3709 2012年9月

Lewis Acid-Specific Polymerization Behaviors in Living Cationic Polymerization of Vinyl Ether with a Malonate Group 査読国際誌

Y. Oda, T. Tsujino, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 50 ( 15 ) 2993 - 2998 2012年8月

Cationic Copolymerization of 1,1-Diphenylethylene with p-Substituted Styrenes 査読国際誌

K. Yasuoka, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 50 ( 14 ) 2758 - 2761 2012年7月

Highly Efficient Synthesis of Heteroarm Star-Shaped Polymers using Polymer-Linking Reaction and Their Characteristic Stimuli-Responsive Behaviors 招待査読

Y. Oda, T. Shibata, H. Tsujimoto, S. Kanaoka, S. Aoshima

Polymer Journal 44 ( 6 ) 541 - 549 2012年6月

高速リビングカチオン重合による極性官能基を有する星型ポリマーの精密合成査読

織田　ゆか里，藤山　栄一，金岡　鐘局，青島　貞人

高分子論文集 69 ( 6 ) 291 - 296 2012年6月

リビングカチオン重合による温度応答性フィルムの創製：様々な応答パターンを有するスマートフィルム査読

瀧下大貴、辻本浩行、金澤有紘、金岡鐘局、青島貞人

高分子論文集 69 ( 6 ) 300 - 304 2012年6月

高感度温度応答性フィルムの創製−ブロックコポリマー構造設計およびフィルム作成条件の影響査読

瀧下大貴、金澤有紘、金岡鐘局、青島貞人

高分子論文集 69 ( 6 ) 305 - 308 2012年6月

New Degradable Alternating Copolymers from Naturally Occurring Aldehydes: Well-Controlled Cationic Copolymerization and Complete Degradation 査読国際誌

Y. Ishido, A. Kanazawa, S. Kanaoka, S. Aoshima

Macromolecules 45 ( 10 ) 4060 - 4068 2012年5月

Synthesis of Fluorine-Containing Star-Shaped Poly(vinyl ether)s via Arm-Linking Reactions in Living Cationic Polymerization 査読国際誌

H. Shimomoto, D. Fukami, T. Irita, K. Katsukawa, T. Nagai, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 50 ( 8 ) 1547 - 1555 2012年4月

Phase Separation Dynamics of Aqueous Poly[2-(2-ethoxy)-ethoxyethyl vinyl ether] Solutions as Explored using the Laser T-Jump Technique Combined with Photometry 査読国際誌

Y. Tsuboi, K. Kikuchi, N. Kitamura, H. Shimomoto, S. Kanaoka, S. Aoshima

Macromolecular Chemistry and Physics 213 ( 4 ) 374 - 381 2012年2月

Block versus Random Amphiphilic Copolymers as Antibacterial Agents 査読国際誌

Y. Oda, S. Kanaoka, T. Sato, S. Aoshima, K. Kuroda

Biomacromolecules 12 ( 10 ) 3581 - 3591 2011年10月

β-メチルスチレン類のカチオン重合査読

安岡幸作、金岡鐘局、青島貞人

高分子論文集 68 ( 7 ) 517 - 519 2011年7月

Fluorinated Vinyl Ether Homopolymers and Copolymers: Living Cationic Polymerization and Temperature-Induced Solubility Transition in Various Organic Solvents Including Perfluoro Solvents 査読国際誌

H. Shimomoto, D. Fukami, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 49 ( 9 ) 2051 - 2059 2011年5月

ルイス酸/アセチルアセトン開始剤系によるビニルエーテルのリビングカチオン重合：アセチルアセトンのプロトン源および配位子としての役割査読

金岡鐘局、中山信也、青島貞人

高分子論文集 68 ( 5 ) 349 - 351 2011年5月

ヘテロポリ酸によるビニルエーテルの不均一リビングカチオン重合査読

松尾陽祐、金岡鐘局、青島貞人

高分子論文集 68 ( 4 ) 176 - 181 2011年4月

Fluorine-Containing Vinyl Ether Polymers: Living Cationic Polymerization in Fluorinated Solvents as New Media and Unique Solubility Characteristics in Organic Solvents 査読国際誌

H. Shimomoto, D. Fukami, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 49 ( 5 ) 1174 - 1182 2011年3月

A Stepping Stone to Stereospecific Living Cationic Polymerization: Cationic Polymerization of Vinyl Ethers using Iron(II) Sulfate 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 48 ( 16 ) 3702 - 3708 2010年8月

Cationic Polymerization of Isobutyl Vinyl Ether using Alcohols Both as Cationogen and Catalyst-Modifying Reagent: Effect of Lewis Acids and Alcohols on Living Nature 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 48 ( 11 ) 2509 - 2516 2010年6月

Chain Multiplying Controlled Cationic Polymerization of Isobutyl Vinyl Ether Using Pyrrole: Increment of Propagating Chains by Efficient “Initiator-Like” Transfer Agent 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Macromolecules 43 ( 8 ) 3682 - 3689 2010年4月

Controlled Cationic Copolymerization of Benzaldehyde with Isobutyl Vinyl Ether using Base-Assisting System 査読国際誌

Y. Ishido, R. Aburaki, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 48 ( 8 ) 1838 - 1843 2010年4月

Well-Defined Alternating Copolymers of Benzaldehydes with Vinyl Ethers: Precision Synthesis by Cationic Copolymerization and Quantitative Degradation to Cinnamaldehydes 査読国際誌

Y. Ishido, R. Aburaki, S. Kanaoka, S. Aoshima

Macromolecules 43 ( 7 ) 3141 - 3144 2010年4月

Living Cationic Polymerization of Vinyl Ether with Methanol/Metal Chloride Initiating Systems: Relationship between Polymerization Behavior and the Nature of Lewis Acids 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Macromolecules 43 ( 6 ) 2739 - 2747 2010年3月

Synthesis of Dual pH/Temperature-Responsive Polymers with Amino Groups by Living Cationic Polymerization 査読国際誌

Y. Oda, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 48 ( 5 ) 1207 - 1213 2010年3月

Living Cationic Polymerization of Isobutyl Vinyl Ether using a Variety of Metal Oxides as Heterogeneous Catalysts: Robust, Reusable, and Environmentally Benign Initiating Systems 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 48 ( 4 ) 916 - 926 2010年2月

Major Progress in Catalysts for Living Cationic Polymerization of Isobutyl Vinyl Ether: Effectiveness of a Variety of Conventional Metal Halides 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Macromolecules 42 ( 12 ) 3965 - 3972 2009年6月

Living Cationic Polymerization of Vinyl Ethers Using a Strong Lewis Acid without Stabilizing Additives: Effective Interaction of Monomers with Growing Ends and/or SnCl₄ 査読国際誌

M. Yonezumi, S. Okumoto, S. Kanaoka, S. Aoshima

Polymer Journal 41 ( 1 ) 16 - 17 2009年1月

Living Cationic Polymerization of Vinyl Ethers in the Presence of a Strong Base: Poisonous or Helpful? 査読国際誌

M. Yonezumi, N. Takano, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 20 ) 6746 - 6753 2008年10月

Synthesis of Various Stimuli-Responsive Gradient Copolymers by Living Cationic Polymerization and their Thermally or Solvent Induced Association Behavior 査読国際誌

K. Seno, I. Tsujimoto, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 19 ) 6444 - 6454 2008年10月

Thermosensitive Gradient Copolymers by Living Cationic Polymerization: Semibatch Precision Synthesis and Step-wise Dehydration-Induced Micellization and Physical Gelation 査読国際誌

K. Seno, I. Tsujimoto, K. Kikuchi, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 18 ) 6151 - 6164 2008年9月

Living Cationic Polymerization of Amide-Functional Vinyl Ethers: Specific Properties of SnCl₄-Based Initiating System 査読国際誌

M. Yonezumi, S. Okumoto, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 18 ) 6129 - 6141 2008年9月

Synthesis and LCST-type Phase Separation Behavior in Organic Solvents of Poly(vinyl ethers) with Pendant Imidazolium or Pyridinium Salts 査読国際誌

K. Seno, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 17 ) 5724 - 5733 2008年9月

Living Cationic Polymerization of Dihydrofuran and its Derivatives 査読国際誌

M. Yonezumi, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 13 ) 4495 - 4504 2008年7月

Synthesis and Solution Properties of Poly(vinyl ether)s with Long Alkyl Chain, Biphenyl, and Cholesteryl Pendants 査読国際誌

K. Seno, A. Date, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 13 ) 4392 - 4406 2008年7月

Thermosensitive Diblock Copolymers with Designed Molecular Weight Distribution: Synthesis by Continuous Living Cationic Polymerization and Micellization Behavior 査読国際誌

K. Seno, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 6 ) 2212 - 2221 2008年3月

Living Cationic Polymerization of α-Methyl Vinyl Ethers using SnCl₄ 査読国際誌

M. Yonezumi, R. Takaku, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 46 ( 6 ) 2202 - 2211 2008年3月

Thermosensitive Gold Nanoclusters Stabilized by Well-Defined Vinyl Ether Star Polymers: Reusable and Durable Catalysts for Aerobic Alcohol Oxidation 査読国際誌

S. Kanaoka, N. Yagi, Y. Fukuyama, S. Aoshima, H. Tsunoyama, T. Tsukuda, H. Sakurai

Journal of the American Chemical Society 129 ( 40 ) 12060 - 12061 2007年10月

Cell Attachment to PET Films Coated with a Thermo-Sensitive Block Copolymer with Different Chemical Composition 査読国際誌

T. Takamoto, K. Yasuda, T. Tsujino, S. Sugihara, S. Kanaoka, S. Aoshima, Y. Tabata

Journal of Biomaterials Science, Polymer Edition 18 ( 9 ) 1211 - 1222 2007年9月

Heterogeneously Catalyzed Living Cationic Polymerization of Isobutyl Vinyl Ether Using Iron (III) Oxide 査読国際誌

A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of the American Chemical Society 129 ( 9 ) 2420 - 2421 2007年3月

Small-angle Neutron Scattering Study on Block and Gradient Copolymer Aqueous Solutions 査読国際誌

S. Okabe, K. Seno, S. Kanaoka, S. Aoshima, M. Shibayama

Polymer 47 ( 21 ) 7572 - 7579 2006年10月

Fast Living Cationic Polymerization of Vinyl Ethers with Iron(III) Chloride in the Presence of a Cyclic Ether: Most Active and Environmentally Benign Catalyst for the Living Cationic Polymerization of Vinyl Ethers 査読国際誌

A. Kanazawa, Y. Hirabaru, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 44 ( 19 ) 5795 - 5800 2006年10月

Quantitative Synthesis of Star-Shaped Poly(vinyl ether)s with a Narrow Molecular Weight Distribution by Living Cationic Polymerization 査読国際誌

T. Shibata, S. Kanaoka, S. Aoshima

Journal of the American Chemical Society 128 7497 - 7504 2006年6月

Micellization Study on Block and Gradient Copolymer Aqueous Solutions by DLS and SANS 査読国際誌

S. Okabe, K. Seno, S. Kanaoka, S. Aoshima, M. Shibayama

Macromolecules 39 ( 4 ) 1592 - 1597 2006年2月

Polymer Surface Modification Using Diblock Copolymers Containing Azobenzene 査読国際誌

T. Yoshida, M. Doi, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 43 ( 22 ) 5704 - 5709 2005年11月

Photo-Responsive Copolymers with Azobenzene Side Groups Synthesized by Living Cationic Polymerization: Efficient Amplification of Photosensitivity in Aqueous Photo-Switching System 査読国際誌

T. Yoshida, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 43 ( 21 ) 5337 - 5342 2005年11月

Living Cationic Polymerization of Azobenzene-Containing Vinyl Ether and Its Photoresponsive Behavior 査読国際誌

T. Yoshida, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 43 ( 21 ) 5138 - 5146 2005年11月

Temperature Sensitization of Liposomes by Use of Thermosensitive Block Copolymers Synthesized by Living Cationic Polymerization: Effect of Copolymer Chain Length 査読国際誌

K. Kono, T. Murakami, T. Yoshida, Y. Haba, S. Kanaoka, T. Takagishi, S. Aoshima

Bioconjugate Chemistry 16 ( 6 ) 1367 - 1374 2005年11月

Photosensitive Copolymers with Various Types of Azobenzene Side Groups Synthesized by Living Cationic Polymerization 査読国際誌

T. Yoshida, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 43 ( 18 ) 4292 - 4297 2005年9月

Instant Living Cationic Polymerization Using SnCl₄/ EtAlCl₂ with a Weak Lewis Base: Ultrafast Polymerization in Seconds 査読国際誌

T. Yoshida, A. Kanazawa, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 43 ( 18 ) 4288 - 4291 2005年9月

Stimuli-Responsive Reversible Physical Networks. II. Design and Properties of Homogeneous Physical Networks Consisting of Periodic Copolymers Synthesized by Living Cationic Polymerization 査読国際誌

T. Yoshida, S. Kanaoka, H. Watanabe, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 43 ( 13 ) 2712 - 2722 2005年7月

Stimuli-Responsive Reversible Physical Networks. I. Synthesis and Physical Network Properties of Amphiphilic Block and Random Copolymers with Long Alkyl Chains by Living Cationic Polymerization 査読国際誌

T. Yoshida, K. Seno, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 43 ( 6 ) 1155 - 1165 2005年3月

Double Thermosensitive Diblock Copolymers of Vinyl Ethers with Pendant Oxyethylene Groups: Unique Physical Gelation 査読国際誌

S. Sugihara, S. Kanaoka, S. Aoshima

Macromolecules 38 ( 5 ) 1919 - 1927 2005年3月

Effect of Tacticity of Poly(N-isopropylacrylamide) on the Phase Separation Temperature of Its Aqueous Solutions 査読国際誌

B. Ray, Y. Okamoto, M. Kamigaito, M. Sawamoto, K. Seno, S. Kanaoka, S. Aoshima

Polymer Journal 37 ( 3 ) 234 - 237 2005年3月

リビングカチオン重合による脂肪族多環基をもつブロックコポリマーの合成および温度応答性フィルムの創製査読

塩野翔平、金岡鐘局、青島貞人

高分子論文集 62 ( 2 ) 92 - 95 2005年2月

温度応答性ミセルを形成するジブロックコポリマーのリビングカチオン重合による合成査読

西川佳菜、金岡鐘局、青島貞人

高分子論文集 62 ( 2 ) 87 - 91 2005年2月

Fast Living Cationic Polymerization Accelerated by SnCl₄. I. New Base-Stabilized Living System for Various Vinyl Ethers with SnCl₄/EtAlCl₂ 査読国際誌

T. Yoshida, T. Tsujino, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 43 ( 2 ) 468 - 472 2005年1月

Synthesis and Self-Association of Stimuli-Responsive Diblock Copolymers by Living Cationic Polymerization 査読国際誌

S. Aoshima, S. Sugihara, M. Shibayama, S. Kanaoka

Macromolecular Symposia 215 ( 1 ) 151 - 164 2004年8月

Stimuli-Responsive ABC Triblock Copolymers by Sequential Living Cationic Polymerization: Multistage Self-Assemblies through Micellization to Open Association 査読国際誌

S. Sugihara, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 42 ( 11 ) 2601 - 2611 2004年6月

Thermosensitive Random Copolymers of Hydrophilic and Hydrophobic Monomers Obtained by Living Cationic Copolymerization 査読国際誌

S. Sugihara, S. Kanaoka, S. Aoshima

Macromolecules 37 ( 5 ) 1711 - 1719 2004年3月

Stimuli-Responsive Diblock Copolymers by Living Cati-onic Polymerization: Precision Synthesis and Highly Sensitive Physical Gelation 査読国際誌

S. Sugihara, K. Hashimoto, S. Okabe, M. Shibayama, S. Kanaoka, and S. Aoshima

Macromolecules 37 ( 2 ) 336 - 343 2004年1月

Thermosensitive Polyalcohols: Synthesis via Living Cationic Polymerization of Vinyl Ethers with a Silyloxy Group 査読国際誌

S. Sugihara, K. Hashimoto, Y. Matsumoto, S. Kanaoka, S. Aoshima

Journal of Polymer Science Part A: Polymer Chemistry 41 ( 21 ) 3300 - 3312 2003年11月

Synthesis of Multibranched Polymers by Linking Reactions of Linear Block Copolymers with Pendant Vinyl Groups by Conventional Radical Polymerization 査読国際誌

S. Kanaoka, C. Koyama, T. Higashimura

Polymer Journal 35 ( 2 ) 167 - 172 2003年2月

Cationic Copolymerization of Indene with Styrene Derivatives: Synthesis of Random Copolymers of Indene with High Molecular Weight 査読国際誌

S. Kanaoka, N. Ikeda, A. Tanaka, H. Yamaoka, and T. Higashimura

Journal of Polymer Science Part A: Polymer Chemistry 40 ( 14 ) 2449 - 2457 2002年7月

Amphiphilic Heteroarm Star-Shaped Polymers by Living Cationic Polymerization: A Unique Behavior in Aqueous Solution 査読国際誌

S. Kanaoka, S. Nakata, H. Yamaoka

Macromolecules 35 ( 12 ) 4564 - 4566 2002年6月

Synthesis of Star-Shaped Poly(vinyl ether)s by Living Cationic Polymerization: Pathway for Formation of Star-Shaped Polymers via Polymer Linking Reactions 査読国際誌

S. Kanaoka, N. Hayase, T. Higashimura

Polymer Bulletin 44 ( 5-6 ) 485 - 492 2000年7月

Synthesis of Star-Shaped Poly(vinyl ethers) with Many Arms by Living Cationic Polymerization 査読国際誌

S. Kanaoka, Y. Fujita, T. Higashimura

Macromolecular Rapid Communications 21 ( 5 ) 218 - 222 2000年3月

Living Cationic Polymerization of n-Butyl Propenyl Ether 査読国際誌

Y. Terada, S. Kanaoka, T. Higashimura

Journal of Polymer Science Part A: Polymer Chemistry 38 ( 1 ) 229 - 236 2000年1月

Living Cationic Polymerization of p-Alkoxystyrene by Free Ionic Species 査読国際誌

S. Kanaoka, T. Higashimura

Journal of Polymer Science Part A: Polymer Chemistry 37 ( 19 ) 3694 - 3701 1999年10月

The Propagating Species in Living Cationic Polymerization: Living Nature and Steric Structure of Polymers 査読国際誌

S. Kanaoka, T. Higashimura, M. Sawamoto

Macromolecular Symposia 132 ( 1 ) 75 - 84 1998年7月

Synthesis of Star-Shaped Poly(p-Alkoxystyrenes) by Living Cationic Polymerization 査読国際誌

H. Deng, S. Kanaoka, M. Sawamoto, T. Higashimura

Macromolecules 29 ( 5 ) 1772 - 1777 1996年2月

Living Cationic Polymerization of p-Chlorostyrene and Related Para-Substituted Styrene Derivatives at Room Temperature 査読国際誌

S. Kanaoka, Y. Eika, M. Sawamoto, T. Higashimura

Macromolecules 29 ( 5 ) 1778 - 1783 1996年2月

Living Ring-Opening Metathesis Polymerization in Aqueous Media Catalyzed by Ruthenium Carbene Complexes 査読国際誌

D. M. Lynn, S. Kanaoka, R. H. Grubbs

Journal of the American Chemical Society 118 ( 4 ) 784 - 790 1996年1月

Synthesis of Block Copolymers of Silicon-Containing Norbornene Derivatives via Living Ring-Opening Metathesis Polymerization Catalyzed by a Ruthenium Carbene Complex 査読国際誌

S. Kanaoka, R. H. Grubbs

Macromolecules 28 ( 13 ) 4707 - 4713 1995年6月

Star-Shaped Polymers by Living Cationic Polymerization. VIII. Size and Shape of Star Poly(vinyl ether)s Determined by Dynamic Light Scattering and Computer Simulation 査読国際誌

S. Kanaoka, M. Sawamoto, T. Higashimura, J. Won, C. Pan, T. P. Lodge, M. Fujiwara, D. M. Hedstrand, and D. A. Tomalia

Journal of Polymer Science Part B: Polymer Physics 33 ( 4 ) 527 - 535 1995年3月

Star-Shaped Polymers by Living Cationic Polymerization. VII. Amphiphilic Graft Polymers of Vinyl Ethers with Hydroxyl Groups: Synthesis and Host-Guest Interaction 査読国際誌

S. Kanaoka, M. Sueoka, M. Sawamoto, T. Higashimura

Journal of Polymer Science Part A: Polymer Chemistry 31 ( 10 ) 2513 - 2521 1993年9月

Star-Shaped Polymers by Living Cationic Polymerization. 6. Amphiphilic Star-Shaped Block Polymers of Vinyl Ethers with Carboxyl Groups: Synthesis and Host-Guest Interaction 査読国際誌

S. Kanaoka, M. Sawamoto, T. Higashimura

Die Makromolekulare Chemie 194 ( 7 ) 2035 - 2046 1993年7月

Synthesis, Properties, and Functions of Multi-Armed Polymers with Functional Groups by Living Cationic Polymerization 査読

Shokyoku Kanaoka

1993年3月

Star-Shaped Polymers by Living Cationic Polymerization. 5. Core-Functionalized Amphiphilic Star-Shaped Polymers of Vinyl Ethers with Hydroxyl Groups: Synthesis and Host-Guest Interaction 査読国際誌

S. Kanaoka, M. Sawamoto, T. Higashimura

Macromolecules 26 ( 2 ) 254 - 259 1993年1月

Star-Shaped Polymers by Living Cationic Polymerization. 4. Selective Host-Guest Interaction of Small Molecules by Amphiphilic Star-Shaped Polymers of Vinyl Ethers 査読国際誌

S. Kanaoka, M. Sawamoto, T. Higashimura

Macromolecules 25 ( 24 ) 6414 - 6418 1992年11月

Star-Shaped Polymers by Living Cationic Polymerization. 3. Synthesis of Heteroarm Amphiphilic Star-Shaped Polymers of Vinyl Ethers with Hydroxyl or Carboxyl Pendant Groups 査読国際誌

S. Kanaoka, T. Omura, M. Sawamoto, T. Higashimura

Macromolecules 25 ( 24 ) 6407 - 6413 1992年11月

Star-Shaped Polymers by Living Cationic Polymerization. 2. Synthesis of Amphiphilic Star-Shaped Block Polymers of Vinyl Ethers with Hydroxyl Groups 査読国際誌

S. Kanaoka, M. Sawamoto, T. Higashimura

Macromolecules 24 ( 11 ) 5741 - 5745 1991年10月

Star-Shaped Polymers by Living Cationic Polymerization. 1. Synthesis of Star-Shaped Polymers of Alkyl Vinyl Ethers 査読国際誌

S. Kanaoka, M. Sawamoto, T. Higashimura

Macromolecules 24 ( 9 ) 2309 - 2313 1991年4月

Amphiphilic Block Copolymers of Vinyl Ethers by Living Cationic Polymerization. II. Synthesis and Surface Activity of Macromolecular Amphiphiles with Pendant Amino Groups 査読国際誌

S. Kanaoka, M. Minoda, M. Sawamoto, T. Higashimura

Journal of Polymer Science Part A: Polymer Chemistry 28 ( 5 ) 1127 - 1136 1990年4月

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