In this work, we present the synthesis and characterization of a new series of wholly-aromatic copolyesters derived from the condensation of various weight fractions of 4,4’-(o- phenylenedioxy)dibenzoic acid (OPDB) and substituted terephthalic acid (BTA) with 2-phenylhydroquinone (PHQ). The Higashi method, involving tosyl chloride and pyridine as solvent, was employed to yield polymer with significant molecular weight. These polymers are intended to enable accessible clearing transition and to control the balance of stiffness and toughness in melt-spun fibers systematically. We report the synthetic details along with characterization of quiescent phase behavior and morphology.
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Nagvekar, D.S., Mather, P.T., Jeon, H.G. et al. New Wholly-Aromatic Thermotropic Polyesters with Controlled Flexibility. MRS Online Proceedings Library 559, 165–170 (1999). https://doi.org/10.1557/PROC-559-165