Abstract: The compatibility of polycarbonate/poly(ethylene terephthalate)（PC/PET） blends was studied using DSC, SEM, and other testers. Without compatibilizers, the two glass transition temperatures of PC and PET shifted closer to each other with increasing content of PET, which meant that this blend was partially miscible. The melt flowability was improved by the addition of PET and achieved the optimum effect when PET content was about 65 %. The addition of different compatibilizers reduced the tensile and flexural properties in some extent, however, the impact strength was increased greatly. By adding only 3 phr of ethylene-butyl acrylate-glycidyl methacrylate copolymer (PTW) or 7 phr of ethylene-ethyl acrylate copolymer (EEA) into PC/PET(30/70), the impact strength increased from 5.5 to 10 kJ/m2. Compatibilizer PTW with glycidyl methacrylate (GMA) groups resulted in the best improvement of the two-phase interface.

Key words: polycarbonate, poly (ethylene terephthalate ), blending, compatibility, ethylene-butyl acrylate-glycidyl methacrylate copolymer, ethylene-ethyl acrylate copolymer