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 |
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頁(從 - 到) | 1861-1868 |
頁數 | 8 |
期刊 | Macromolecules |
卷 | 27 |
發行號 | 7 |
出版狀態 | 已發佈 - 1月 1 1994 |
對外發佈 | 是 |
ASJC Scopus subject areas
- 材料化學