Abstract: Poly(epoxy ester) was synthesized by bisphenol A epoxy and adipic acid, and it was added to the PC/ABS blends as a new compatilizer. PC/ABS blends with the compatilizer was processed by twin-screw extruder and injection molding machine. The compatibility of the poly(epoxy ester) was evaluated by DSC, SEM and mechanical property, and compared with maleic anhydride grafted polystyrene(SMA). The results showed that the poly(epoxy ester) had a better compatibility with PC, while SMA had a better compatibility with ABS. Poly(epoxy ester) and SMA added into PC/ABS blends simultaneously could significantly improved the compatibility of PC/ABS alloy. The content of poly(epoxy ester) at a low level could led to significant increase in both notched impact strength and tensile strength. The notched impact strength dramaticly decreased with excess poly(epoxy ester) addition. SEM showed that the poly(epoxy ester) compatilizer made the ABS disperse evenly. The size of ABS domains in PC/ABS blends was reduced when the two kinds of compatilizer used simultaneously. The compatibility of PC/ ABS blends was improved correspondingly.

Key words: polycarbonate, acrylonitrilebutadienestyrene copolymer, synthesis, alloy, compatibility, poly(epoxy ester), maleic anhydride grafted polystyrene