【摘要】 本文采用聚乙烯的马来酸酐接枝共聚物（PE-g-MAH）作为第三组份,与PC/PE共混物形成三元共混体系,进行PC共混改性研究。随着PE-g-MAH量的增加,PC/PE共混物的缺口冲击强度有明显的提高,而机械强度和工作温度影响不大。用扫描电镜对掺入不同量的PE-g-MAH的PC/PE共混物进行了形态研究,观察到在PC/PE共混物中,PE分散在PC的连续相中成为两相结构,但分散得很不均匀,随着PE-g-MAH含量增加,分散渐趋均匀,在用CHCl₈蚀刻,PC/PE共混物的扫描电镜各呈许多小球（PE）分散在PC连续相中,小球边界十分清晰。加了20％PE-g-MAH后,边界清晰的小球消失,PE-g-MAH起了相容剂的作用,并用动态力学性能测试作了证实。更多还原

【Abstract】 The present study concerns the grafting of maleic anhydride (MAH) onto polyethylene (PE) to toughen polycarbonate (PC) /PE blends. A series of ternary blends of PC, PE and PE-g-MAH with different concentrations of PE-g-MAH were prepared. Their tensile strengths and Izod impact strengths were examined. Their notched impact strengths increase as increasing PE-g-MAH content. Scanning electron microscopy (SEM) was used for the morphology investigation. Specimens for this purpose were obtained by dissolving HDPE with hot xylene and by dissolving PC with chloroform. SEM shows that all of PC/ PE/PE-g-MAH ternary blends have two-phase structures whose morphology is strongly dependent on the concentration of PE-g-MAH . HDPE dispersed phase in the PC matrix was observed in PC/PE blend,but the morphology were varied with the addition of PE-g-MAH, in which PE-g-MAH used was considered as a compatibilizer.更多还原