| Project/Area Number |
08455436
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
高分子合成
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
TEZUKA Yasuyuki Tokyo Institute of Technology, Department of Organic and Polymeric Materials, co-professor, 工学部, 助教授 (80155457)
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| Co-Investigator(Kenkyū-buntansha) |
OIKE Hideaki Tokyo Institute of Technology, Department of Organic and Polymeric Materials, as, 工学部, 助手 (20282824)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | three-component graft copolymer / surface formation / environmental response / intelligent polymeric material / macromolecular topology / 3成分グラフト共重合体 / 高分子材料表面 / 動的表面特性 |
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| Research Abstract |
The present study has aimed to obtain new insights for the environmental response behavior, unique to flexible polymer materials surfaces. The precise design with respects to the segment topology of multicomponent polymer molecule is a prerequisite for unprecedented functions required in advanced application fields from bioengineering to tribology.
We have first examined on the surface formation and environmental response behavior on three-component copolymer systems. Thus we have synthesized PVA (polyvinyl alcohol) and PU (polyurethane) -based three-component systems, i.e.PVA or PU as the main chain segment and PS (polystirene) -block-PDMS (polydimethylsiloxane) as a graft segment, in which the geometrical arrangement of the three segments is inverse to the order of their surface energies, i.e.PVA (orPU) >PS>PDMS.The surface formed under the influence of the two conflicting driving forces exhibited unique environmental response by the change of the contacting medium from air to water.
We have also designed a new polymer reaction process by making use of self-assembly principle in order to pre-organize macromolecular components, and subsequently converting them into permanent polymer arcitectures. Thus a unique feature, i.e.electrostatic self-assembly and subsequent covalent fixation capability, of the pyrrolidinium salt end groups has been applied for the preparation of topologically-unique, branched polymers, ring polymers and network polymers. The simple coprecipitation of the monofunctional telechelics having a cyclic onium salt group with plurifunctional carboxylates of appropriate nucleophilic reactivities has been carried out to produce the corresponding star- and comb-shaped polymers, and that of bifunctional telechelics with bifunctional carboxylate leading to the ring polymers in a diluted solution as well as the chain-extended "segmented" polymers and "model-network" polymers in a condensed phase, respectively.
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