Study On The Preparation Of High Performance ABS Resins Via Continuous Bulk Polymerization

ABS resin is a kind of general engineering material, because of its full range, many brand and better performance, it can be widely used in automotive trim, electronics, office supplies and so on. As far as the process of ABS synthesis, the emulsion grafting-bulk SAN mixing method has a complex process, large energy consumption and serious environment pollution, however, continuous bulk polymerization has a simple process, little energy used and slight environment damage, so it is widely attract people’s attention. In this paper, we used the continuous bulk polymerization to synthetize ABS resins, this method may become a hot ways to synthetize ABS resin in industrial production field. In the experiment stage, we chose plug flow reactor to composed a reaction system of polymerization. Firstly, we smoothly synthesized275brand of ABS resins, so as to debug the reaction equipment and synthesized middle impact ABS resins at the same time, used domestic rubbers replaced import rubbers, so as to decrease the cost of production and optimized process at the same time, in order to improve the impact of ABS resins, and provided technical support to Huajin Chemical Group. Secondly, we started with1322and565T as rubber toughen system, and successfully synthesized high impact ABS resins, these results, we can provide help for Huajin Chemical Group. At last, we synthesized heat-resisting ABS resin on the pilot scale test equipment based on the research of heat-resisting ABS resin in our laboratory, we can offer technical service to Huajin.In the process of synthesized high impact ABS resins, we consult Shanghai Haiyi Group high impact ABS resin recipe, used1322and565T rubber composed as compounded toughener, in the recipe, the percentage of rubber is12%. After that, we changed565T to30AF rubber with the same quantity, we found that used1322and30AF compounded rubber toughener synthesized ABS resin has a higher impact, compared with3904brand of ABS resin which produced by Dow Chemical Company, our sample’s impact higher than3904brand of ABS resinThen we chose some rubbers who have a higher viscosity to composed different kinds of compounded tougheners, such as55AE and35AE rubbers. In order to fit bear capacity of the equipment, we decreased the percentage of rubber to9%. After the experiments, we found that the sample which produced by55AE and35AE rubbers as compounded toughener has a excellent toughness. Afterwards, we kept on experiment only adjust the ratio of55AE and 35AE rubbers from1:2to2:1, the result indicated that the sample which produced use55AE and35AE ratio is2:1has a higher impact. Though instrumented impact test proved the rubber toughener developed the best toughness, compared with3904, its impact is higher than3904brand of ABS resin.At last, we added the fourth monomer (NPMI) to synthesize heat-resisting ABS resin, though the research in our laboratory, we inspected the influence of add NPMI ways on the polymerization reaction conversion and matrix resins’Tg. Then we chose the best program developed experiment continue on the pilot scale test equipment. The results indicated that when we added NPMI at the first and the third reactors entrance at the same time with equal quantity, the sample we obtained has appropriate MFR, at the same time, this sample’s distortion temperature and tensile strength is the best, and has a least drop of impact.