| Project/Area Number |
15K13703
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Polymer chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
手塚 育志 東京工業大学, 物質理工学院, 教授 (80155457)
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| Co-Investigator(Renkei-kenkyūsha) |
INOUE Joe 慶應義塾大学, 先端生命科学研究所, 特任准教授 (00433714)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 高分子合成 / 環状高分子 |
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| Outline of Final Research Achievements |
Telechelic poly(ethylene oxide) with anthryl or coumarinyl end groups was synthesized. An aqueous solution of the telechelics was irradiated with UV light at 365nm to form a cyclic polymer product via photodimerization of the anthryl or coumarinyl end groups. Moreover, the cyclic-to-linear reverse topological transformation was conducted by thermal cleavage or photocleavage of the cyclized polymers by heating or irradiation of UV light at 254 nm.
Moreover, cyclic block copolymers consisting of poly(L- or D-lactide) and poly(ethylene oxide), i.e., PLLA-PEO and PDLA-PEO, respectively, were synthesized from their corresponding linear triblock PLLA-PEO-PLLA and PDLA-PEO-PDLA precursors. Photocleavable cyclic PLLA-PEO and PDLA-PEO block copolymers having an o-nitrobenzyl group were synthesized. A mixture of micellar solutions of these block copolymers formed a gel upon UV irradiation.
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