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采用乳液聚合方法合成不同粒径SBR粒子,在此基础上制备出折光指数可控的ABS改性剂,研究ABS改性剂中SBR粒子粒径与改性剂壳层单体接枝时引发剂CHP用量对ABS/PVC合金性能影响,同时对ABS/PVC合金进行透射电镜观察。结果表明:ABS改性剂中SBR粒径为225 nm时,合金达到最大冲击强度,而获得最佳光学性能时SBR粒径为123 nm;同时发现ABS改性剂中壳层单体接枝时CHP用量过少会导致ABS/PVC合金力学性能与光学性能下降,而用量过多时改性剂对PVC的增韧效率降低。
The emulsion polymerization method was used to synthesize SBR particles with different particle sizes. Based on this, ABS modifiers with controlled refractive index were prepared. The effects of SBR particle size and modifier on the grafting of initiator CHP dosage on the performance of ABS / PVC alloy, while ABS / PVC alloy TEM observation. The results showed that the maximum impact strength of SBR was obtained when the particle size of SBR was 225 nm in ABS modifier, and the diameter of SBR was 123 nm when the optimal optical properties were obtained. At the same time, Too little CHP will lead to the decrease of mechanical properties and optical properties of ABS / PVC alloy, but the toughening efficiency of modifier to PVC will decrease when the dosage is too much.