增容作用对PP/PA6原位微纤复合材料形貌及性能的影响

以马来酸酐接枝聚丙烯（PP-g-MAH）为增容剂，采用熔融挤出?热拉伸法制备了聚丙烯（PP）/聚酰胺6（PA6）/PP-g-MAH原位微纤复合材料。研究了复合材料的微观相形态以及结晶、流变和力学性能。结果表明，加入0.5 %（质量分数，下同）的PP-g-MAH有利于大长径比PA6微纤的形成；而当PP-g-MAH的含量继续增加时，相界面相容性的提高反而阻碍了微纤的生成；加入0.5 % PP-g-MAH的PP/PA6原位微纤复合材料在动态流变特性中呈现出很强的弹性响应，并且其结晶和力学性能显著改善。

Effect of Compatibilizer on Morphology and Performance of PP/PA6 Microfibrillar Composites

Polypropylene （PP）/Polyamide 6 （PA6） microfibrillar composites were prepared by melt extrusion-hot stretching with maleic anhydride-grafted PP （PP-g-MAH） as a compatibilizer， and their phase morphology and crystallization， rheological and tensile properties were investigated. The results indicated that the addition of 0.5 % PP-g-MAH （mass fraction） was beneficial to the formation of PA6 microfibrils with a high aspect ratio. A further increase in the content of PP-g-MAH improved the interfacial compatibility but hindered the formation of the microfibrils. The PP/PA6 microfibrillar composites containing 0.5 % PP?g?MAH presented a strong elastic response in terms of the dynamic rheological properties， leading to an obvious improvement in the crystallization and tensile properties of microfibrillar composites.