ANOMALOUS COMPRESSIBILITY OF N-ISOPROPYLACRYLAMIDE GELS NEAR THE VOLUME PHASE-TRANSITION TEMPERATURE

被引：20

作者：

KATO, E ^{[1
]}

KITADA, T ^{[1
]}

NAKAMOTO, C ^{[1
]}

机构：

[1] OSAKA CITY UNIV,FAC ENGN,OSAKA 558,JAPAN

来源：

MACROMOLECULES | 1993年 / 26卷 / 07期

关键词：

D O I：

10.1021/ma00059a040

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The effect of hydrostatic pressure up to 105.2 MPa on the phase diagram (temperature vs ratio of volume) of N-isopropylacrylamide gel and its compressibility near the volume phase transition temperature were examined. The volume phase transition changed from a slightly discontinuous one to a continuous one with increasing pressure, and there seemed to be little change of the transition temperature. The compressibility drastically changed from positive values (swollen phase) to negative values (shrunken phase) at the transition temperature. The volume of the gel for the shrunken phase increased in spite of applying pressure in the vicinity of the transition temperature. The obtained anomalous compressibility was analyzed according to the theory of free energy of the gel.

引用

页码：1758 / 1760

页数：3

共 12 条

[1]

FLORY PJ, 1966, PRINCIPLES POLYM CHE, pCH13

[2] VOLUME PHASE-TRANSITION OF GELS UNDER UNIAXIAL TENSION [J].