STRUCTURE EVOLUTION AND KINETICS OF THERMOREVERSIBLE GELATION IN A RIGID-ROD POLYIMIDE M-CRESOL SYSTEM

被引：17

作者：

KYU, T ^{[1
]}

YANG, JC ^{[1
]}

CHENG, SZD ^{[1
]}

HSU, SLC ^{[1
]}

HARRIS, FW ^{[1
]}

机构：

[1] UNIV AKRON,M MORTON INST POLYMER SCI,AKRON,OH 44325

来源：

MACROMOLECULES | 1994年 / 27卷 / 07期

关键词：

D O I：

10.1021/ma00085a030

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Biphenyltetracarboxylie dianhydride-(perfluoromethyl)benzidine (BPDA-PFMB) polyimide/m-cresol solutions showed thermoreversible gelation associated with thermally induced phase separation and subsequent liquid crystal formation. In this study, phase equilibria and structure evolution in a BPDA-PFMB/m-cresol solution were investigated by differential scanning calorimetry, polarized optical microscopy, and depolarized light scattering. A temperature-composition phase diagram of BPDA-PFMB/m-cresol was established by a cloud point method. Kinetic aspects of the phase transition were studied in the framework of a nucleation and growth theory. The average domain size, which characterized the length scale of rigid-rod aggregates, was found to depend on supercooling.

引用

页码：1861 / 1868

页数：8

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