INTRINSIC VISCOSITY-MOLECULAR WEIGHT RELATIONSHIPS FOR POLY(N-ISOPROPYLACRYLAMIDE) SOLUTIONS

被引:190
|
作者
FUJISHIGE, S
机构
[1] Research Inst for Polymers &, Textiles, Tsukuba, Jpn, Research Inst for Polymers & Textiles, Tsukuba, Jpn
关键词
MOLECULAR WEIGHT - SOLUTIONS - Viscosity;
D O I
10.1295/polymj.19.297
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Poly(N-isopropylacrylamide) prepared by free radical polymerization was successfully fractionated into several fractions by using a carefully water-freed acetone as solvent and n-hexane as non-solvent. Based on the viscometric and osmometric studies of these fractions, the intrinsic viscosity-molecular weight relationships were determined. It was also found that the aqueous solution exhibited an abnormal concentration dependence of viscosity at temperatures higher than 25 degree C and the phase separation at 30 degree C.
引用
收藏
页码:297 / 300
页数:4
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