Study On The Synthesis Of Abs Resin Based On SIBL In Emulsion Polymerization

ABS resins are two-phase composite materials toughened by rubber, so the type of rubber has an important influence on the performance of the ABS resin. Polybutadiene latex is always as toughening rubber, ABS resin toughened by polybutadiene latex has good cold resistance and good impact strength, but butadiene is the only monomer consisting of the polybutadiene latex. In order to improve the performance of ABS resin and increase the diversity of ABS resin, this particle research the emulsion copolymeraization of Styrene. Isoprene,Butadiene. Integrated rubber gathers the characterisitics of polybutadiene rubber. polyisoprene rubber, styrene-isoprene rubber and styrene-butadiene rubber, so it is a comprehensive performance rubber. Using SIBL as grafting latex of ABS resin, which is novel, simple and low-cost technology, has great theoretical significance and application value.In this article, taking styrene, isoprene and butadiene as monomers, persulfate as initiator, styrene-isoprene-butadiene copolymer was prepared by radical emulsion polymerization method. Compared with polybutadiene, this article studied the influence of monomer ratio, the amount of emulsifier and electrolyte on polymerization reaction kinetics, latex particle size and polydispersity, the degree of crosslinking of the rubber and glass transition temperature. The experimental results showed polymerization rate of styrene-isoprene-butadiene copolymer was clearly faster, latex particle size is about l00nm with low distribution, gel content and rubber glass transition change greatly,gel content changed from84.71%to55.91%, Tg changed from-76.5℃to-40.3℃In this article, using polybutadiene latex agglomeration technology to achieve the goal of agglomeration of ternary latex. Studying the influence of the amount of agglomeration agent, emulsifier, stirring speed and temperature on the latex particle. The result shows the agglomeration technology can achieve the SIBL larger particle size, particle size from l00nm to300nm.In this article, using redox initiator system to achieve SIBL emulsion grafting polymerization. Through flocculation, washed and dried, high rubber content ABS power can be achieved. ABS power and SAN resin through melt blending and extrusion granulated to get ABS resin. Investigated the monomer ratio and the amount emulsifier on the grafting polymerization and ABS performance. The result shows that the grafting of SIBL is higher than PBL, Izod of ABS resin toughened by PBL is68.82J/m, however when S/I/B=3:3:4, Izod of ABS resin toughened by SIBL is128.37J/m.In addition, using20L polymerization reactor to achieve the goal of amplification. The results show that the method is feasible, ABS resin toughened by ternary integrated latex has excellent overall performance, one of the most representative of ABS resin toughness Izod notched impact strength has been significantly improved, when the monomer ratio S/I/B=1:1:8and the rubber content is15%, the impact strength of ABS resin is233J/m, the monomer ratio S/1/B=3:3:4, the rubber content is20%. the impact strength of ABS resin is337J/m, the rubber content is25%, the impact strength of ABS resin is403J/m, which proved strong technical support for the industrialization.