Study on In-situ Compatibilized Polyvinyl Chloride/Polystyrene Blends Catalyzed by Anhydrous Aluminum Chloride

Abstract

In order to improve the compatibility of the blend, the in-situ compatibilization of polyvinyl chloride and polystyrene blends (PVC/PS) were prepared successfully in the presence of anhydrous aluminum chloride. The structure of PVC/PS blends was characterized by FTIR. The peaks of 1943 cm-1and 838 cm-1 in FTIR spectrum revealed that the substitution for para-position of benzene was realized. The properties of PVC/PS blends were characterized by SEM, DSC, and tests of mechanical properties. The results show that adding appropriate amount of PS, anhydrous alluminium chloride and styrene, the interface adhesion of PVC/PS blends increased. The tensile strength increased from 49.35 MPa to 61.03 MPa, the notched impact strength of PVC/PS blends reached 5.3 kJ /m2, compared with 3.9 kJ /m2 of PVC, increased by 35.9%. The glass-transition temperature of PVC/PS blends is 89℃ between 83℃ of PVC and 106℃ of PS. The optimum adding amount of PS, anhydrous aluminum chloride and styrene is 6%, 0.6% and 9%, respectively.