电子显微镜观察表明,以乙丙橡胶(EPR)为主干,聚苯乙烯(PS)为支链的接枝共聚物EPR-g-PS的基本形态是高度分散的聚苯乙烯微区(约几百?)存在于乙丙橡胶连续相中的两相体系,随接枝共聚物中聚苯乙烯含量增加,微区形态发生变化,少量的接枝共聚物在PS与EPR共混物中起“增容剂”作用,使分散相微区变得小而均匀,多重玻璃化转变的存在进一步证实了接枝共聚物相分离的形态结构。 Electron microscope observation showed that the basic morphology of EPR-grafted copolymer EPR-g-PS, which is mainly composed of ethylene-propylene rubber (EPR), is highly dispersed polystyrene micro-domains ?) Exist in the continuous phase of ethylene-propylene rubber two-phase system, with the graft copolymer of polystyrene content increased, micro-morphological changes, a small amount of graft copolymer in the PS and EPR blends “increase Solvent ”effect, the dispersed phase micro-zone becomes small and uniform, the existence of multiple glass transition further confirmed the morphology of the graft copolymer phase separation.