【摘要】 利用双螺杆挤出机制备了尼龙6(PA6)/芳纶浆粕(PPTA-pulp)/马来酸酐接枝聚合物复合材料,研究了两种马来酸酐接枝物(POE-g-MAH、LLDPE-g-MAH)对复合材料的力学性能、断面形态以及结晶性能的影响。其中POE-g-MAH能明显的提高复合材料PA6/PPTA-pulp的冲击强度和断裂伸长率,POE-g-MAH含量为3%时,PA6/PPTA-pulp/POE-g-MAH的拉伸强度和弯曲强度达到实验范围内的最佳值,此时其断裂伸长率和冲击强度较未加马来酸酐接枝物体系,分别提高了57.9%和28.8%。3%马来酸酐接枝物的加入有效增强了PA6和PPTA-pulp间的界面结合力,对复合材料的结晶具有诱导作用,且并不会改变PA6的晶型。更多还原

【Abstract】 A series of polyamide 6(PA6)/PPTA-pulp/MAH-polymeric composites are synthesized via melt blending in a twin-screw extruder using two MAH-polymers respectively,and the effects of the MAH-polymers on the mechanical properties,the morphology of the fractured surfaces and the crystallization of the composites are characterized.Both the impact strength and elongation at break of PA6/PPTA-pulp composites can be improved markedly by adding POE-g-MAH,and the tensile strength and flexural strength of PA6/PPTA-pulp/POE-g-MAH composites also be improved.Within the scope of this study when the POE-g-MAH content is 3% it will achieve the best result with which the impact strength and elongation at break of composites are increased by 57.9% and 28.8%,respectively,compared with non-MAH-polymeric system.The addition of 3% of MAH-polymer can improve the interface compatibility of PA6 and PPTA-pulp,and reduce the crystallization of composites,while won’t change the crystalline PA6.更多还原