IMPROVED METHOD OF MAKING THERMOTROPIC LIQUID CRYSTALLINE POLYMERS CONTAINING HYDROQUINONE

摘要

Liquid crystalline polymers that are made from 4-hydroxybenzoic acid, 2,6naphthalenedicarboxylic acid, terephthalic acid, hydroquinone, and N-acetyl-4-aminophenol by heating the monomers in the presence of acetic anhydride are more easily synthesized in high molecular weight if isophthalic acid is also included as a monomer at a level of about 0.5 mole % to about 10 mole %.