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

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

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
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

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

abstract = "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.",

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T1 - Structure evolution and kinetics of thermoreversible gelation in a rigid-rod polyimide/m-cresol system

AU - Kyu, Thein

AU - Yang, Jen Chang

AU - Cheng, Stephen Z D

AU - Hsu, Steven L C

AU - Harris, Frank W.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - 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.

AB - 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.

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

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