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Abstract
The thermotropic liquid crystalline copolyesters were prepared by direct polycondensa-tion reaction of terephthalic acid, isophthalic acid, p-acetoxy benzoic acid with various diacetylated diols. All these copolyesters were characterized by their elemental analysis and spectroscopic techniques. The transition temperatures of all compounds are confirmed by DSC technique and optical texture of the copclyesters in liquid crystalline state were observed on polarizing microscope. Most of the polymers exhibit a typical nematic mesophase. All polymers have very good thermal stability.