PA6/EPM/EPM-g-MAH共混物结构与性能研究

Study on Morphology and Properties of PA6/EPM/EPM-g-MAH Blends

采用二元乙丙橡胶接枝马来酸酐(EPM-g-MAH)作为二元乙丙橡胶(EPM)增韧聚酰胺6(PA6)的增容剂,研究了PA6/EPM/EPM-g-MAH三元共混物的流变性能、力学性能和微观形态。结果表明,EPM-g-MAH可以与PA6发生增容反应生成接枝共聚物,改善了PA6和EPM的界面相容性。随着EPM-g-MAH含量的增加,共混物中分散相粒径更加细化,共混物的熔融峰温下降,缺口冲击强度显著提高,当EPM/EPM-g-MAH的配比为10/10时,共混物的冲击强度达到最大为47 kJ/m2,比纯PA6提高了8倍。

Ethylene-propylene rubber grafted maleic anhydride （EPM-g-MAH） was introduced into blends of polyamide 6/ethylene propylene rubber （PA6/EPM） as a compatibilizer. The effects of EPM-g-MAH on the rheological behavior, mechanical properties, and morphology of the ternary blends were studied. It showed that PA6 and EPM were compatibilized by in-situ reaction between PA6 and EPM-g-MAH. EPM domains were distributed more homogeneously in PA6 matrix with the increasing EPM-g-MAH content. When the weight ratio of EPM/EPM-g-MAH was 10/10, the notched impact strength reached maximum of z[7 kJ/m2 , which increased 8 times that of neat PA6.