Structure evolution and kinetics of thermoreversible gelation in a rigid-rod polyimide/m-cresol system

Thein Kyu, Jen Chang Yang, Stephen Z D Cheng, Steven L C Hsu, Frank W. Harris

研究成果: 雜誌貢獻文章同行評審

19 引文 斯高帕斯(Scopus)

摘要

Biphenyltetracarboxylic 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.
原文英語
頁(從 - 到)1861-1868
頁數8
期刊Macromolecules
27
發行號7
出版狀態已發佈 - 一月 1 1994
對外發佈

ASJC Scopus subject areas

  • 材料化學

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