高抗冲本体丙烯腈-丁二烯-苯乙烯嵌段共聚物的合成与表征

Synthesis and characterization of high-impact bulk acrylonitrile-butadiene-styrene block terpolymer

以嵌段溶聚丁苯橡胶（b-SSBR）为增韧剂,采用连续本体工艺制备出高抗冲丙烯腈-丁二烯-苯乙烯嵌段共聚物（ABS-SSBR）。利用透射电子显微镜（TEM）、旋转沉降粒径仪分别观测了ABS-SSBR树脂的微观结构、橡胶粒子的粒径及其分布,考察了b-SSBR用量对ABS-SSBR树脂力学性能的影响,并与低顺式聚丁二烯橡胶（LCBR）增韧的本体ABS树脂（ABS-LCBR）进行了对比。结果表明,在橡胶用量相同的情况下,与ABS-LCBR树脂相比,ABS-SSBR树脂的冲击强度高,橡胶粒子的粒径主要集中在0.8~1.1μm,适宜的橡胶用量为8.1%~8.5%（占聚合总单体量的质量分数）。

The high- impact acrylonitrile- butadiene- styrene block terpolymer（ ABS） was prepared by continuous bulk process with block soluble polystyrene- butadiene rubber（ b- SSBR） as toughening agent. The microstructure of ABS resin was observed by transmission electron microscopy（ TEM）,the rubber particle size and its distribution were determined by the rotation sedimentation grain- size instrument,the effect of b- SSBR amount on the mechanical properties of ABS resin was investigated,and ABS- SSBR was compared with the bulk ABS resin toughened by low cis- polybutadiene rubber（ LCBR）. The results showed that under the condition of the same amount of rubber,the impact strength of ABS- SSBR resin was higher than that of ABS- LCBR resin,the rubber particle size of ABS- SSBR mainly focused on 0. 8-1. 1 μm,and the optimum content of b- SSBR was8. 1%- 8. 5%（ the mass fraction of total amount of monomer polymerization）.