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Thermotropic liquid crystalline copolyesters. I. Synthesis and thermal characterization of the copolyesters of terephthaloyl chloride, hydroquinone, and 1,4‐butane diol
Author(s) -
Rath Asoke K.,
Ponrathnam Surendra
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070490303
Subject(s) - thermotropic crystal , copolyester , differential scanning calorimetry , terephthaloyl chloride , hydroquinone , polyester , materials science , butane , diol , crystallinity , polymer chemistry , glass transition , chloride , liquid crystal , polymer , chemical engineering , condensation polymer , organic chemistry , liquid crystalline , chemistry , composite material , catalysis , thermodynamics , physics , optoelectronics , metallurgy , engineering
A new series of random thermotropic liquid crystalline polyesters (LCPs) was synthesized from terephthaloyl chloride, hydroquinone, and 1,4‐butane diol. The copolyester composition was varied by changing the relative mole ratio of hydroquinone and 1, 4‐butane diol in the feed. All the copolyesters displayed thermotropic liquid crystallinity at relatively low temperatures. Liquid crystalline behavior of the copolyesters has been characterized by polarizing light microscopy and by differential scanning calorimetry (DSC). The effect of co‐polyester composition on the temperature and thermodynamic parameters related to liquid crystalline transition is discussed. © 1993 John Wiley & Sons, Inc.