SEGMENTED LIQUID-CRYSTALLINE COPOLYMERS AND BLENDING WITH ENGINEERINGPLASTICS

Two series of segmented copolyesters were synthesized, in which the fl exible blocks were poly(ethylene terephthalate) (PET) and the hard blo cks were fully aromatic triads as mesogens. The copolymers maintained the ability to form a mesophase at temperatures above the melting poin ts when they contained only 12% equivalent p-hydroxyl benzoate (PHB) m oiety as in PHB/PET random copolymer. With increasing length of the PE T segments in the copolymers, their compatibility with PET matrix in b lending was improved better than normal liquid crystalline polymers (L CPs) for in-situ composites. Some mechanical properties of the polyble nds were primarily measured for potential usage in this respect.