The experimental results demonstrate that in the impact specimen there exists a multiphase system comprising homopolymer of propylene, diblock copolymer of propylene and ethylene -propylene, ethylene-propylene rubber (EPR) and homopolymer of ethylene.

• 实验结果表明:抗冲PP是一个含有PP均聚物、丙烯与乙烯-丙烯两嵌段共聚物、乙丙橡胶(EPR)、聚乙烯均聚物等的多相体系。