| Project/Area Number |
14350493
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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 |
高分子構造・物性(含繊維)
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SHIBAYAMA Mitsuhiro The University of Tokyo, Institute for Solid State Physics, Professor, 物性研究所, 教授 (00175390)
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| Co-Investigator(Kenkyū-buntansha) |
NAGAO Michihiro The University of Tokyo, Institute for Solid State Physics, Research Associate, 物性研究所, 助手 (90301150)
SETO Hideki Kyoto University, Faculty of Science, Associate Professor, 大学院・理学研究科, 助教授 (60216546)
KUNUGI Shigeru Kyoto Institute of Technology, Dept. of Polymer Science, Professor, 繊維学部, 教授 (70111929)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥13,700,000 (Direct Cost: ¥13,700,000)
Fiscal Year 2003: ¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 2002: ¥7,900,000 (Direct Cost: ¥7,900,000)
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| Keywords | gel / micelle / small-angle neutron scattering / dynamic light scattering / high pressure / polyampholyte / poly(N-isopropyl acrylamide) / microemulsion / 両親媒性高分子 |
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| Research Abstract |
Various types of phase separation and phase transition phenomena have been observed for soft condensed matter at atmospheric pressure. Though the phase behavior of soft condensed matter depends strongly on hydrostatic pressure, investigations on pressure effects have been limited. Particularly, pressure effects are important in systems where hydrophobic interactions are involved. We studied pressure effects on the phase behavior, and structure, and dynamics of polymer solutions and gels, and microemulsion systems. The phase behavior, microscopic structure, and dynamics of environment sensitive polymer gels, poly(N-isopropyl acrylamide) in water, were extensively investigated as a function of both temperature and pressure. The pressure-temperature phase diagram was convex-upward function. Critical divergence and critical slowing down were observed by approaching the phase boundary. These phenomena were explained in conjunction with the hydrophobic interaction.
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