Novel polymer gels based on phase structure of aqueous dispersion of polymer microgels
| Project/Area Number |
21550204
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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 |
Polymer/Textile materials
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | ガラス化 / コロイド結晶化 / ポリ(N-イソプロピルアクリルアミド)ゲル / 光散乱 / 高分子マイクロゲル |
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| Research Abstract |
Phase transition of aqueous dispersions of monodisperse poly(N-isopropylacrylamide) microgels was investigated. From the phase diagram drawn on the basis of the diffracted light from the dispersions, it was found that the critical crystallization volume fraction was independent of temperature, which indicates that phase transition in this colloidal system was dominated by repulsive inter-particle interaction. The relaxation dynamics of the concentrated dispersions was investigated by a dynamic light scattering technique. In liquid phase above the melting temperature, usual translational diffusion of the particles was observed. In contrast, the diffusion coefficient in crystalline and glassy states increased with decreasing temperature despite the increasing size of the microgels. Gels synthesized by the subsequent polymerization in the presence of the microgels had a good extension strength compared to the conventional ones without the microgels.
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Report
(4 results)
Research Products
(24 results)
