| Project/Area Number |
13031048
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Kyoto University, Graduate School of Engineering |
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Principal Investigator |
TANAKA Fumihiko Kyoto Univ., Graduate School of Engineering, Professor, 工学研究科, 教授 (50107695)
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| Co-Investigator(Kenkyū-buntansha) |
KOGA Tsuyoshi Kyoto Univ., Graduate School of Engineering, Research Associate, 工学研究科, 助手 (80303866)
庄司 雅彦 京都大学, 工学研究科, 助手 (30335202)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥15,600,000 (Direct Cost: ¥15,600,000)
Fiscal Year 2003: ¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 2002: ¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 2001: ¥4,500,000 (Direct Cost: ¥4,500,000)
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| Keywords | sequential hydrogen bond / sol / gel transition / Coil / Helix Transition / biopolymer gels / double-helical crosslinks / hydrogen-bond-induced helical polymers / transient polymer networks / zipper-like polymer complex / ジッパー型架橋 / ゲル・ペア転移 / 分子内架橋 / 水素結合超分子 / 水素結合ゲル / 液晶 / 水素結合高分子ネットワーク / 多相臨界性 / 結合の組み替え / 相分離 / 異方性ネットワーク / 複合メソゲン |
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| Research Abstract |
Phase diagrams of biopolymer networks crosslinked by double helices are theoretically derived. The relationship between coil-to-helix transition and sol-gel transition is clarified. Molecular mechanism of network formation in helix-forming polymers is syudied on the basis of polymer solution theory and cascade theory of gelation. We found a new phase at low temperatures in which polymers are dimerized (pairing phase).
Helix formation of polymers by hydrogen-bonded chiral molecules is theoretically studied and compared with recent experiments on carboxyphenyl acethylene in the mixture of amins and amino alcohols. Molecular mechanism of majority rule and sergeants-and-soldiers law is clarified. Amplification of helices by stretching such helical polymers is studied and a new method of optical resolution of racemic mixtures is proposed.
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