2004 Fiscal Year Final Research Report Summary
Study on volume phase transition of gels induced by helix-coil transition
| Project/Area Number |
15540392
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biophysics/Chemical physics
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| Research Institution | Kyoto University |
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Principal Investigator |
TAKENAKA Mikihito Kyoto University, Graduate School of Engineering, Instructor, 工学研究科, 助手 (30222102)
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| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Hirokazu Kyoto University, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (60127123)
HASHIMOTO Takeji Kyoto University, Graduate School of Engineering, Professor, 工学研究科, 教授 (20026230)
KOIZUMI Satoshi Japan Atomic Energy Research Institute, Senior Researcher, 先端基礎研究センター, 副主任研究員 (00343898)
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| Project Period (FY) |
2003 – 2004
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| Keywords | Coil-Helix transition / Volume Phase Transition of Gel / Time-resolved Light Scattering / Time-resolved Neuron Scattering / キラル高分子 / N-プロパギルアミド |
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| Research Abstract |
We investigated time-evolution of shear moduli in the physical gelation process of 1,3:2,4-bis-0-(p-metylbenzylidene)-D-sorbitol (PDTS) in polystyrene melt system containing 2.5 wt% of PDTS. At the gel point, storage and loss shear moduli, G' and G'', were described by the power law of frequency ω, G'〜G''-ω^n, with the critical exponent n equal to 2/3, in agreement with the value predicted by the percolation theory. The exponent n and the gel strength S at the gel point measured as a function of quench depth ΔT indicated that the fractal network structure of PDTS does not change with ΔT but that the mechanical strength of the network increases with ΔT. Before reaching the gel point, G'(ω) and G''(ω) obtained at various times can be well superposed onto the master curves, indicating that the mechanical as well as structural self-similarity hold in this gelating process.
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Research Products
(15 results)
