PP-g-(GMA-co-St)增容PVC/PP共混物的研究

制备了一种新型的多单体接枝PPPP-g-（GMA—co—St）]，研究了其对聚氯乙烯／聚丙烯（PVC／PP）共混体系的增容作用。讨论了接枝PP用量对共混物的界面相互作用、力学性能、耐热变形性能和加工流变性能的影响，并通过扫描电镜（SEM）对共混物的微观相结构进行了观察。结果表明，该接枝PP对PVC／PP共混体系有较好的增容效果，接枝PP的加入使共混物的界面相互作用增强。共混物的力学性能在接枝PP用量为20份时最佳；熔体流动速率在其质量分数为20％后下降缓慢，共混物的耐热变形性能随PP—g-（GMA—co—St）用量的增加而增强。

Study on PP-g-(GMA-co-St) compatibilizing PVC/PP blends

The multi-monomers melt-grafting onto polypropylene was prepared by one-step,and characterized by FTIR technique.The influence of PP-g-(GMA-co-St) on the surface interaction,mechanic properties,heat destorting behavior as well as MFR of PVC/PP blend were investigated by means of tensile test,and SEM machine.The results show that the surface interaction between two phases is strengthened,the mechanical properties of PVC/PP blends increased with the increasing of PP-g-(GMA-co-St) mass ratio,and reach to the highest when PP-g-(GMAco-St) is 20%,the heat destorting behavior is strengthened and the MFR unchange when PP-g-(GMA-co-St) is above 20%,the microstructure,which was analysised through SEM are all agree well with mechanical properties.