Aromatic polyesters 5 and 6 were synthesized from tert‐butyl‐ and phenoxyhydroquinone (4a and 4b) and terephthalic acids 3a–e. The introduction of substituents reduces the phase transition temperature and increases the solubility of the corresponding polyesters in common solvents. As a result, soluble, amorphous and liquid‐crystalline aromatic polyesters were obtained. Unexpectedly, the phenoxyhydroquinone moiety suppresses the formation of a mesophase in some polyesters.
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Heitz et al. (1990) studied this question.
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