A series of semi‐aromatic poly(ether‐ester)s containing cinnamic group was prepared from 4,4′‐diacrylic acid‐α,ω‐phenoxyalkanes with diols in the presence of diphenylchlorophosphate (DPCP) and pyridine as a catalyst and solvent. The phase behavior of these polymers was studied by differential scanning calorimetry (DSC), optical polarizing microscopy equipped with a heating stage, and wide‐angle x‐ray diffraction (WAXD). All of the poly(ether‐ester)s, except P3, show nematic or smectic thermotropic liquid crystalline behaviour under optical polarizing microscopic observation. These polymers can undergo photocrosslinking reaction upon heating, as examined by IR, solubility, and DSC analysis.
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Li et al. (1993) studied this question.
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