Abstract: Aseries of sequential block copol'ymers was synthesized by polycon-densation of 1,10-decanediol, poly(oxytetramethylene)glycol (MW=1050) and the mesogenic monomer 2-methyl-p-phenylene di(4-chloroformyl)benzoate. These polymers were found to be liquid crystalline when the feed ratio of poly(oxytetramethylene)glycol to 1,10-decanediol was less than 70 to 30. The mesomorphic behavior of these polymers was characterized by a polarizing microscope, a DSCinstrument and a X-ray diffractometer.

Key words: Thermotropic liquid crystal copolyestcrs, Sequential block copolymers, 2-Methyl-p-phenylene bis(4-chloroformyl)benzoate