Abstract:A series of poly (butyl acrylate) graft copolymers were synthesized via atom transfer radical polymerization with activators regenerated by electron transfer (ARGET ATRP) and conventional radical polymerization. The graft copolymers were utilized as compatibilizer in the blends of styrene-acrylonitrile copolymer resin and acrylate rubber system(SAN/ACM). Effects of the structure of main chain, the molecular weight of the side chain, the graft density, and the amount of graft copolymer on the performance of ASA resins were investigated in detail. The graft copolymers obtained were characterized by GPC and FT-IR. The mechanical performances were investigated by impact testing machine and DMA. The results show that poly (butyl acrylate) graft copolymers are successfully synthesized. In the blends of SAN/ACM, graft copolymer with SAN as main chain shows better compatibilization than that with PBA as main chain. When the molecular weight of the side chain is small, SAN-g-PBA performs better. The impact strength of blends with poly (butyl acrylate) graft copolymer reaches the maximum value as the graft density of the graft copolymer is 3. When the amount of compatibilizer used is 3% of the total mass, the impact strength reaches 6.06 kJ/m2. DMA shows that the glass transition temperature of SAN and ACM comes closer to each other after the addition of graft copolymer, which indicates that poly (butyl acrylate) graft copolymer plays a role of compatibilizer.