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The nematic liquid crystals of main-chain liquid crystalline (MCLC) Y-n polyesters were investigated and compared with those of conventional MCLC L-n polyesters. Y-n polyesters have Y-shaped mesogens that are connected by spacers at their branch ends as an alternative to the columitic mesogens of L-n polyesters. The nematic phases of both polyesters under polarized optical microscopy exhibited Schlieren...
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