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Liquid crystalline aromatic polyesters containing para ‐linked dimethylbiphenylene moieties
Author(s) -
Shiotani Akinori,
Matsuo Fumio
Publication year - 1996
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/(sici)1097-4628(19960321)59:12<1907::aid-app13>3.0.co;2-o
Subject(s) - polyester , copolymer , biphenyl , condensation polymer , dicarboxylic acid , polymer chemistry , materials science , liquid crystalline , rheology , optical microscope , organic chemistry , chemistry , polymer , scanning electron microscope , composite material
A series of liquid crystalline aromatic polyesters containing 3,3′‐dimethylbiphenyl‐4,4′‐dicarboxylic acid and 3,4′‐dimethyl‐biphenyl‐4,3′‐dicarboxylic acid was prepared by a melt polycondensation procedure and characterized by elemental analysis, DSC and TMA measurements, and optical polarizing microscopy. An optimal composition of the copolymer having a melting temperature around 300°C is proposed and the rheological behavior is discussed. Most of the mechanical properties of this copolymer were found to be close to those of Vectra A950® used as a reference sample. © 1996 John Wiley & Sons, Inc.