Liquid crystalline properties for copoly (ethylene terephthalate/chloro-1, 4-phenylene terephthalate) have been investigated. The polymer was highly sensitive to shear stress and revealed nematic liquid crystal structure at a composition of more than 20 mole% of chlorophenylene terephthalate (CPT). The liquid crystallinity increased with the increase in CPT content and inherent viscosity of the copolymer.
