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

Research output: Contribution to journalArticle

16 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1861-1868
Number of pages8
JournalMacromolecules
Volume27
Issue number7
Publication statusPublished - Jan 1 1994
Externally publishedYes

Fingerprint

Gelation
Polyimides
Supercooling
Kinetics
Phase structure
Phase equilibria
Phase separation
Light scattering
Liquid crystals
Phase diagrams
Optical microscopy
Differential scanning calorimetry
Liquid Crystals
Nucleation
Phase transitions
Chemical analysis
Temperature
4-cresol
benzidine

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Kyu, T., Yang, J. C., Cheng, S. Z. D., Hsu, S. L. C., & Harris, F. W. (1994). Structure evolution and kinetics of thermoreversible gelation in a rigid-rod polyimide/m-cresol system. Macromolecules, 27(7), 1861-1868.

Structure evolution and kinetics of thermoreversible gelation in a rigid-rod polyimide/m-cresol system. / Kyu, Thein; Yang, Jen Chang; Cheng, Stephen Z D; Hsu, Steven L C; Harris, Frank W.

In: Macromolecules, Vol. 27, No. 7, 01.01.1994, p. 1861-1868.

Research output: Contribution to journalArticle

Kyu, T, Yang, JC, Cheng, SZD, Hsu, SLC & Harris, FW 1994, 'Structure evolution and kinetics of thermoreversible gelation in a rigid-rod polyimide/m-cresol system', Macromolecules, vol. 27, no. 7, pp. 1861-1868.
Kyu, Thein ; Yang, Jen Chang ; Cheng, Stephen Z D ; Hsu, Steven L C ; Harris, Frank W. / Structure evolution and kinetics of thermoreversible gelation in a rigid-rod polyimide/m-cresol system. In: Macromolecules. 1994 ; Vol. 27, No. 7. pp. 1861-1868.
@article{c8dcff88f7104c74b0d75325e8b39833,
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.",
author = "Thein Kyu and Yang, {Jen Chang} and Cheng, {Stephen Z D} and Hsu, {Steven L C} and Harris, {Frank W.}",
year = "1994",
month = "1",
day = "1",
language = "English",
volume = "27",
pages = "1861--1868",
journal = "Macromolecules",
issn = "0024-9297",
publisher = "American Chemical Society",
number = "7",

}

TY - JOUR

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.

UR - http://www.scopus.com/inward/record.url?scp=0028387842&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028387842&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0028387842

VL - 27

SP - 1861

EP - 1868

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 7

ER -