Relationship between Crystallinity and Thermal Properties of Thermotropic Liquid Crystal Polyesters

Relationship between Crystallinity and Thermal Properties of Thermotropic Liquid Crystal Polyesters

Crystallinities of thermotropic liquid crystal polyesters (LCPs) were measured by X-ray diffraction. Crystallinities of LCPs estimated by Ruland's method, on the assumption that a glass state liquid crystal is equivalent to an amorphous state, had a good linear relation with their heat deflecti...

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Veröffentlicht in:KOBUNSHI RONBUNSHU 1992/06/25, Vol.49(6), pp.471-474
Hauptverfasser: SUENAGA, Jun-ichi, MATSUMOTO, Tetsuo, KASHIMA, Masaru
Format: Artikel
Sprache:jpn
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Amorphous LCP
Crystallinity
LCP
Ruland
Thermal Endurance
Thermotropic Liquid Crystal Polymer
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container_issue 6
container_start_page 471
container_title KOBUNSHI RONBUNSHU
container_volume 49
creator SUENAGA, Jun-ichi
MATSUMOTO, Tetsuo
KASHIMA, Masaru
description Crystallinities of thermotropic liquid crystal polyesters (LCPs) were measured by X-ray diffraction. Crystallinities of LCPs estimated by Ruland's method, on the assumption that a glass state liquid crystal is equivalent to an amorphous state, had a good linear relation with their heat deflection temperatures. LCPs with higher crystallinity showed higher heat deflection temperature. An LCP with a bulky group on its backbone benzene ring exhibited extremely low crystallinity. The temperature dependence of its dynamic modulus was similar to that of a typical amorphous resin.
doi_str_mv 10.1295/koron.49.471
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subjects Amorphous LCP
Crystallinity
LCP
Ruland
Thermal Endurance
Thermotropic Liquid Crystal Polymer
title Relationship between Crystallinity and Thermal Properties of Thermotropic Liquid Crystal Polyesters
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