Abstract: In this article, styrene-isoprene-butadiene copolymer was synthesized via free radical initiated emulsion polymerization. Acrylonitrile-styrene-butadiene copolymer was toughened by styrene-isoprene-butadiene copolymer latex instead of high cost butadiene latex. To achieve this goal, four steps were taken, synthesis of styrene-isoprene-butadiene copolymer, the agglomeration of styrene-isoprene-butadiene copolymer, emulsion grafting polymerization, and the melt blending of SAN and high rubber content ABS power. Studying the effect of monomer ratio on SIBL kinetics, diameter, polydispersity, gel content and T_g. At the same time, we study the effect of monomer ratio on the grafting efficiency and the performance of ABS resin. The result shows that the method of synthesis of SIBL by free radical initiated emulsion polymerization is possible, the comprehensive properties of ABS resin were improved greatly, Izod from139J/m up to 233J/m.

Key words: integrated latex, emulsion copolymerization, agglomeration, emulsion grafting;acrylontrile-butadiene-styrene copolymer, performance