HYSTERESIS AND INCUBATION IN THE DYNAMICS OF VOLUME TRANSITION OF SPHERICAL GELS

被引：83

作者：

TOMARI, T ^{[1
]}

DOI, M ^{[1
]}

机构：

[1] NAGOYA UNIV, FAC ENGN, DEPT APPL PHYS, NAGOYA, AICHI 46401, JAPAN

来源：

MACROMOLECULES | 1995年 / 28卷 / 24期

关键词：

D O I：

10.1021/ma00128a050

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 dynamics of volume transition of a spherical gel is studied theoretically. The time evolution of the radius and the strain of the gel are calculated numerically. It is shown that (i) the threshold temperature at which the swelling starts to take place is different from the temperature at which the collapsing starts (i.e., there is a hysteresis), (ii) in the swelling process there is an incubation period during which the whole gel is swollen only slightly, followed by the main process in which a large volume change is caused by the motion of the interface between the swollen state and the collapsed state, and (iii) the incubation time becomes longer as the final temperature approaches the threshold temperature. These results are in agreement with experimental observations.

引用

页码：8334 / 8343

页数：10

共 21 条

[11] KINETICS OF SWELLING OF POLYACRYLAMIDE GELS [J].

PETERS, A ;

CANDAU, SJ .

MACROMOLECULES, 1986, 19 (07) :1952-1955

[12]

SEKIMOTO K, 1991, J PHYS II, V1, P19, DOI 10.1051/jp2:1991137

[13]

SEKIMOTO K, 1991, J PHYS II, V1, P1053, DOI 10.1051/jp2:1991200

[14] ELASTIC INSTABILITIES AND PHASE COEXISTENCE OF GELS [J].

SEKIMOTO, K ;

KAWASAKI, K .

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 1989, 154 (03) :384-420

[15] TEMPERATURE HYSTERESIS AND MORPHOLOGY OF VOLUME PHASE-TRANSITION OF GELS [J].

SEKIMOTO, K .

PHYSICAL REVIEW LETTERS, 1993, 70 (26) :4154-4157

[16]

SHIBAYAMA M, VOLUME PHASE TRANSIT, P1

[17] MECHANICAL INSTABILITY OF GELS AT THE PHASE-TRANSITION [J].

TANAKA, T ;

SUN, ST ;

HIROKAWA, Y ;

KATAYAMA, S ;

KUCERA, J ;

HIROSE, Y ;

AMIYA, T .

NATURE, 1987, 325 (6107) :796-798

[18] COLLAPSE OF GELS AND CRITICAL ENDPOINT [J].

TANAKA, T .

PHYSICAL REVIEW LETTERS, 1978, 40 (12) :820-823

[19] CRITICAL KINETICS OF VOLUME PHASE-TRANSITION OF GELS [J].

TANAKA, T ;

SATO, E ;

HIROKAWA, Y ;

HIROTSU, S ;

PEETERMANS, J .

PHYSICAL REVIEW LETTERS, 1985, 55 (22) :2455-2458

[20] KINETICS OF SWELLING OF GELS [J].

TANAKA, T ;

FILLMORE, DJ .

JOURNAL OF CHEMICAL PHYSICS, 1979, 70 (03) :1214-1218

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