Anomalous kinetics of the volume phase transition in poly-N-isopropylacrylamide gels

被引：23
|
作者：
Hirotsu, S [1 ]
机构：
[1] Tokyo Inst Technol, Fac Biosci & Biotechnol, Dept Sci Biol, Midori Ku, Kanagawa 2268501, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1998年 / 37卷 / 3A期
关键词：
polymer gel; volume phase transition; kinetics of phase transition; discontinuous phase transition; polymer network;
D O I：
10.1143/JJAP.37.L284
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Extreme speeding-up of a large, discontinuous volume chan ge at the volume phase transition of poly-N-isopropylacrylamide (PNIPA) gels has been realized. The gels prepared by the new method undergoes a shrinking transition faster by six orders of magnitude as compared with conventional PNIPA gels. The relaxation time of the volume shrinkage can be controlled from seconds to months on the same size of gels. A plausible mechanism of the dramatic speeding up of the volume phase transition, as well as the mechanism of extremely slow kinetics of the conventional PNIPA gels are proposed.
引用
收藏
页码：L284 / L287
页数：4
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