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Shrinking pattern and phase transition velocity of poly(N-isopropylacrylamide) gel
http://hdl.handle.net/10131/1340
http://hdl.handle.net/10131/13405d63db3f-a876-42d3-982d-ea87244a3316
名前 / ファイル | ライセンス | アクション |
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JCP11101.pdf (378.9 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2007-08-09 | |||||
タイトル | ||||||
タイトル | Shrinking pattern and phase transition velocity of poly(N-isopropylacrylamide) gel | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Suzuki, Atsushi
× Suzuki, Atsushi× Yoshikawa, S.× Bai, G. |
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著者(ヨミ) | ||||||
識別子Scheme | WEKO | |||||
識別子 | 22110 | |||||
姓名 | スズキ, アツシ | |||||
著者別名 | ||||||
識別子Scheme | WEKO | |||||
識別子 | 22111 | |||||
姓名 | 鈴木, 淳史 | |||||
著者所属 | ||||||
Yokohama Natl Univ, Dept Mat Sci, Yokohama, Kanagawa 2408501, Japan | ||||||
著者所属 | ||||||
横浜国立大学大学院環境情報研究院人工環境と情報部門循環材料学分野 | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We have studied the shrinking phase transition of cylindrical poly(N-isopropylacrylamide) gels with submillimeter diameter. The macroscopic conformation change and the phase transition velocity were obtained during the heating process by two different methods. One is a continuous heating process with a constant temperature drift rate, and the other is an isothermal process after a steplike temperature increase beyond the transition point. In the former measurement, the phase transition can be controlled by the nucleation mechanism in the smaller temperature drift rates; at the transition point, after the fine pattern appears and disappears on the surface, for instance, the gel gradually and uniformly shrinks while keeping a smooth surface. On the other hand, at the larger temperature drift rates, the phase transition comes into the unstable region before being completed; after the fine pattern disappears, a coarse pattern appears on the surface, and the entire gel becomes opaque. The gel gradually becomes transparent with time from the surface layer to the core portion. These two processes, characterized by two types of surface pattern as well as the growth of a collapsed surface skin layer, can be clearly observed in the latter measurements, which depend on the degree of super-heating (how far the final temperature is from the transition point). The results are discussed qualitatively on the basis of the classical phase separation model of nucleation and spinodal decomposition, as well as the phase diagram of the present gel system. (C) 1999 American Institute of Physics. [S0021-9606(99)70125-X]. | |||||
書誌情報 |
Journal of Chemical Physics 巻 111, 号 1, p. 360-367, 発行日 1999-07-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00219606 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00694991 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1063/1.479278 | |||||
権利 | ||||||
権利情報 | Copyright (1999) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | American Institute of Physics |