Thermotropic poly[oxy(2,6-dimethyl-1,4-phenylene)]-block-poly(oxyterephthaloyloxy-1,4-phenylenealkylene-1,4-phenylene)

Block copolymers containing a rigid [oxy(2,6-dimethyl-1,4-phenylene)] block and thermotropic poly[oxyterephthaloyloxy-1,4-phenylene-hexamethylene (or/and decamethylene)-1,4-phenylene] blocks were synthesized. Their structures were examined by means of ¹H and ¹³C NMR and X-ray diffraction, and their liquid crystalline properties investigated by polarizing microscopy.