Blends of a Thermotropic Liquid Crystalline Polymer and Polyarylate and the Determination of the Polymer-Polymer Interaction Parameter of the Two Polymers

摘要

Polyarylate (PAr) is a kind of aromatic polyesters, except a special case, the most commercial PAr is an amorphous thermoplastics that combine clarity, high heat-deflection temperature, high impact strength and good electrical properties with inherent ultraviolet stability and flame resistance. But it has a difficulty to process for its high glass transition temperature (T_g) therefore LCP was introduced which can play the role of decreasing viscosity and make an easy to process. PAr-LCP blends have good mechanical properties and are used to the places required high performance. In the present study, we examine thermal properties and transestrication reactions of screw-extruded blends of PAr-LCP blends by DSC and FT-IR. Also, using Flory's lattice theory, we are examining the degree of disorder (y/x_1) and polymer-polymer interaction parameter (x_(12) between PAr and LCP.