增韧剂对长纤维增强PA66复合材料性能的影响

采用熔融浸渍法制备了长玻璃纤维增强PA66复合材料，通过对树脂熔体黏度、预浸料浸渍程度和纤维断裂率、材料力学性能进行测试及扫描电子显微镜（SEM）观察，分别研究了不同含量的增韧剂乙烯-辛烯共聚物接枝马来酸酐（POE-g-MAH）和乙烯-辛烯共聚物接枝甲基丙烯酸缩水甘油酯（POE-g-GMA）对复合材料性能的影响。实验结果表明：随着含量的提高，两种增韧剂均能够使长玻璃纤维增强PA66复合材料的冲击强度增大，树脂与纤维界面的结合程度提升，其中POE-g-GMA的增韧及界面改善效果更为明显，可有效提升复合材料的力学性能。

Influence of toughening agents on the properties of long fiber reinforced polyamide 66 composites

Long fiber reinforced polyamide 66 composites have been prepared by the melt impregnation method. The influence of added POE-g-MAH and POE-g-GMA on the properties of the composites was invesgated comparing the viscosity of the resulting resin melts, the impregnation degree and fiber fracture degree of prepregs, and the mechanical properties and scanning electron microscope images of the composites. The results show that an increase in the content of either toughening agent resulted in an improvement in the impact strength and interfacial adhesion between the fiber and resin in the long fiber reinforced polyamide 66 composites. It was found that POE-g-GMA can improve the toughness, interfacial adhesion and the properties of composites more effectively than POE-g-MAH.