VOLUME CHANGE KINETICS OF TEMPERATURE-SENSITIVE POLY(VINYL METHYL-ETHER) GEL

被引：63

作者：

KABRA, BG ^{[1
]}

AKHTAR, MK ^{[1
]}

GEHRKE, SH ^{[1
]}

机构：

[1] UNIV CINCINNATI,DEPT CHEM ENGN,CINCINNATI,OH 45221

来源：

POLYMER | 1992年 / 33卷 / 05期

基金：

美国国家科学基金会;

关键词：

DIFFUSION; SORPTION; SYNERESIS; RESPONSIVE GEL; HYDROGEL; POLY(VINYL METHYL ETHER);

D O I：

10.1016/0032-3861(92)90014-N

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Thermally responsive gels of poly (vinyl methyl ether) (PVME) were formed by the gamma-irradiation of solutions of linear PVME. Under precisely defined synthesis conditions, the shrinking rates of the gels could be increased to values well above the range observed for gels formed by copolymerization/crosslinking reactions. This enhancement in rate appears related to the development of a microporous structure which allows the convective expulsion of solvent from the network; this occurs more quickly than the diffusive motion of the network. The overall rate of a cyclical process using responsive gels can also be enhanced if one stage of the process, either swelling or shrinking, is reversed before equilibrium is achieved.

引用

页码：990 / 995

页数：6

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