|
1
|
Facile and green route polymerization of N-vinyl pyrrolidone under ultrasound-aided dual-site phase transfer catalytic conditions. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-04979-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
|
2
|
Kohsaka Y, Akae Y, Kawatani R, Kazama A. Polymer chemistry of α-substituted acrylates designed for functional-group synergy. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.1989311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Yasuhiro Kohsaka
- Research Initiative for Supra-Materials (RISM), Shinshu University, Nagano, Japan
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Yosuke Akae
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| | - Ryo Kawatani
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
| | - Akane Kazama
- Faculty of Textile Science and Technology, Shinshu University, Nagano, Japan
- Japan Society for the Promotion of Science, Tokyo, Japan
| |
Collapse
|
|
3
|
Matsuoka SI, Awano N, Nakazawa M, Suzuki M. Tail-to-tail dimerization and Rauhut-Currier reaction of disubstituted Michael acceptors catalyzed by N-heterocyclic carbene. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.11.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
|
4
|
Kohsaka Y, Tanimoto Y. Synthesis of Thermo-Responsive Polymer via Radical (Co)polymerization of N,N-Dimethyl-α-(hydroxymethyl)acrylamide with N,N-Diethylacrylamide. Polymers (Basel) 2016; 8:polym8100374. [PMID: 30974651 PMCID: PMC6431880 DOI: 10.3390/polym8100374] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/13/2016] [Accepted: 10/14/2016] [Indexed: 11/16/2022] Open
Abstract
α-Functionalized acrylamides have not been considered as an effective monomer design due to their poor polymerizability, although the analogues, α-functionalized acrylates, are attractive monomers of which polymers exhibit characteristic properties. In this article, we report the first example of radical polymerization of α-functionalized N,N-disubstituted acrylamide affording thermo-responsive hydrophilic polymers. N,N-dimethyl-α-(hydroxymethyl)acrylamide (DMαHAA) was (co)polymerized with N,N-diethylacrylamide (DEAA). Although the homopolymerization did not afford a polymeric product, the copolymerizations with various feed ratios yielded a series of the copolymers containing 0%–65% of DMαHAA units. The obtained copolymers exhibited a lower critical solution temperature (LCST) in water; the cloud points (Tcs) were linearly elevated as the contents of DMαHAA units from 32 to 64 °C, indicating that DMαHAA functioned as a more hydrophilic monomer than DEAA. The linear relationship between Tc and DMαHAA content suggests that the homopolymer, poly(DMαHAA), should have Tc at ca. 80 °C, although it is not available by direct radical homopolymerization.
Collapse
Affiliation(s)
- Yasuhiro Kohsaka
- Faculty of Textile Science and Technology, Shinshu University, Nagano 386-8567, Japan.
| | - Yoshiaki Tanimoto
- Faculty of Textile Science and Technology, Shinshu University, Nagano 386-8567, Japan.
| |
Collapse
|
|
5
|
Heyns IM, Pfukwa R, Klumperman B. Synthesis, Characterization, and Evaluation of Cytotoxicity of Poly(3-methylene-2-pyrrolidone). Biomacromolecules 2016; 17:1795-800. [DOI: 10.1021/acs.biomac.6b00210] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ingrid M. Heyns
- Department
of Chemistry and Polymer Science, Stellenbosch University, Private Bag
X1, Matieland 7602, South Africa
| | - Rueben Pfukwa
- Department
of Chemistry and Polymer Science, Stellenbosch University, Private Bag
X1, Matieland 7602, South Africa
| | - Bert Klumperman
- Department
of Chemistry and Polymer Science, Stellenbosch University, Private Bag
X1, Matieland 7602, South Africa
| |
Collapse
|
|
6
|
Ohishi H, Kosaka Y, Kitazawa K, Goseki R, Kawauchi S, Ishizone T. Living Anionic Polymerization of α-Methyleneindane: An Exo-Methylene Hydrocarbon Monomer. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01601] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Haruka Ohishi
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yuki Kosaka
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Keita Kitazawa
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Raita Goseki
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Susumu Kawauchi
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takashi Ishizone
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
|
7
|
Kosaka Y, Kawauchi S, Goseki R, Ishizone T. High Anionic Polymerizability of Benzofulvene: New Exo-Methylene Hydrocarbon Monomer. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00944] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Yuki Kosaka
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Susumu Kawauchi
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Raita Goseki
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takashi Ishizone
- Department
of Organic and
Polymeric Materials, Tokyo Institute of Technology 2-12-1-S1-13 Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
|
8
|
|
|
9
|
Hirao A, Goseki R, Ishizone T. Advances in Living Anionic Polymerization: From Functional Monomers, Polymerization Systems, to Macromolecular Architectures. Macromolecules 2014. [DOI: 10.1021/ma401175m] [Citation(s) in RCA: 183] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Akira Hirao
- Department
of Organic and Polymeric Materials, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-S1-13, Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
- Institute
of Polymer Science and Engineering, National Taiwan University, No.
1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren Ai Road, Suzhou Industrial Park, Suzhou 215123, China
| | - Raita Goseki
- Department
of Organic and Polymeric Materials, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-S1-13, Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takashi Ishizone
- Department
of Organic and Polymeric Materials, Graduate School of Science and
Engineering, Tokyo Institute of Technology, 2-12-1-S1-13, Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
|
10
|
Kosaka Y, Kitazawa K, Inomata S, Ishizone T. Living Anionic Polymerization of Benzofulvene: Highly Reactive Fixed Transoid 1,3-Diene. ACS Macro Lett 2013; 2:164-167. [PMID: 35581780 DOI: 10.1021/mz4000078] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Anionic polymerization of benzofulvene (BF, α-methyleneindene), an exomethylene monomer having a fixed transoid 1,3-diene moiety, quantitatively proceeded with sec-BuLi or diphenylmethylpotassium in THF at -78 °C for 1 h. The resulting poly(BF)s possessed the predicted molecular weights based on the molar ratios between monomer and initiators and narrow molecular weight distributions (Mw/Mn = 1.1). High anionic polymerizability of BF was realized by the fact that a well-defined diblock copolymer, poly(methyl methacrylate)-block-poly(BF), was obtained by the sequential copolymerization of BF with a low nucleophilic enolate anion of living poly(methyl methacrylate) in quantitative efficiency. NMR analyses indicated that the repeating units of poly(BF) consisted of a 1,2-addition unit (41%) and a 1,4-addition unit (59%) without a 3,4-addition unit, suggesting that the exomethylene group of BF always participated in the polymerization. Thus, BF acted as a novel polymerizable transoid 1,3-diene in the anionic polymerization.
Collapse
Affiliation(s)
- Yuki Kosaka
- Department
of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13
Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Keita Kitazawa
- Department
of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13
Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Sotaro Inomata
- Department
of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13
Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takashi Ishizone
- Department
of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1-S1-13
Ohokayama, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|