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

doi:10.1021/ma00085a030

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 journal › Article › peer-review

19 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 language	English
Pages (from-to)	1861-1868
Number of pages	8
Journal	Macromolecules
Volume	27
Issue number	7
DOIs	https://doi.org/10.1021/ma00085a030
Publication status	Published - Mar 1 1994
Externally published	Yes

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1021/ma00085a030

Cite this

@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 = mar,

day = "1",

doi = "10.1021/ma00085a030",

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 - 1994/3/1

Y1 - 1994/3/1

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

U2 - 10.1021/ma00085a030

DO - 10.1021/ma00085a030

M3 - Article

AN - SCOPUS:0028387842

SN - 0024-9297

VL - 27

SP - 1861

EP - 1868

JO - Macromolecules

JF - Macromolecules

IS - 7

ER -

Structure Evolution and Kinetics of Thermoreversible Gelation in a Rigid-Rod Polyimide/m-Cresol System

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this