ABS树脂中胶含量对PC/ABS合金微观结构的影响

Influence of Rubber Content in ABS Resin on Microstructure of PC/ABS Alloy

本实验采用胶含量为60%的ABS接枝粉料与SAN树脂以不同比例进行共混,制备了胶含量范围为10%～55%的ABS树脂。将胶含量不同的ABS树脂与PC以30/70、50/50、70/30的比例利用熔融共混技术,制备了组成不同的PC/ABS共混物。利用SEM电镜观察了PC/ABS合金的微观结构。研究表明,ABS树脂含量为30%时,在合金中形成分散相;ABS树脂含量为70%时,形成连续相;ABS树脂含量为50%时与PC形成双连续相结构。在三种结构中,ABS树脂胶含量的增加都使合金的相形态变得更精细。

ABS resins with different rubber content ranged from 10% to 55% were prepared by melt blending ABS graft copolymer with 60% rubber content with SAN resins at different ratio, PC/ABS alloy with different composition were prepared by blending ABS resins with different rubber content with PC at different ratio. The microstructure of the PC/ ABS alloy was observed by SEM. The study showed that ABS resin was dispersed phase in the alloy when its cotent was 30% , and was continuous phase when its eotent was 70%. They formed continuous phase when ABS resin cotent was 50%. A-long with the increase of the rubber content in ABS resin, the photograph of alloy became more fine.