PA 6原位成纤复合改善PP的力学性能  

Mechanical properties of polypropylene modified with polyamide 6 by in-situ fibrillation method

作　　者：孙显茹[1] 熊彦可[1] 张昊[1] 吴其晔[1] 

机构地区：[1]青岛科技大学教育部橡塑材料与工程重点实验室,山东省青岛市266042

出　　处：《合成树脂及塑料》2012年第3期57-60,共4页China Synthetic Resin and Plastics

基　　金：国家自然科学基金资助项目(50273016;50390090;50573037)

摘　　要：采用挤出-热拉伸-淬冷法制备均聚聚丙烯(PP-H)/聚酰胺(PA)6原位成纤复合材料,研究PA 6的原位微纤化对PP-H力学性能的影响。结果表明:实验设计工艺可实现PA 6在PP-H基体中的原位微纤化,纤维直径约为0.5～2.0μm,但PA 6微纤与PP-H基体的界面结合性差,对PP-H的力学性能改善不佳;添加少量增容剂马来酸酐接枝聚丙烯,可显著改善PP-H的力学性能,当w(PA 6)为15%时,添加少量增容剂后,复合材料的拉伸强度、弯曲强度、简支梁缺口冲击强度分别为未添加增容剂时的1.27,1.39,1.49倍;注塑温度对复合材料中PA 6分散相的形态及材料力学性能有明显影响,高温注塑试样的力学性能普遍低于低温注塑试样。Homopolypropylene （PP-H）/polyamide 6 （PA 6） in-situ fibrillation composites were prepared in the process of extrusion-hot stretching-water quenching. The influences of in-situ fibrillation of PA 6 on mechanical properties of PP-H were studied. The results show that in-situ fibrillation of PA 6 in PP-H matrix can be realized with the technology designed in the experiment and the diameter of the obtained fibers is about 0.5-2.0μm. However, the interface compatibility between PA 6 fiber and PP-H matrix is so weak that the mechanical properties of PP-H can not be improved obviously. Adding a small amount of maleic anhydride grafted PP as compatibilizer can significantly ameliorate the mechanical properties of PP-H. The tensile strength, flexible strength and notched Charpy impact strength of the composite are 1.27, 1.39, 1.49 times of those of the composite without compatibilicer, respectively, when the mass fraction of PA 6 is 15 % and the compatibilizer in small quantity is added. The injection temperature has obvious impact on the morphology of PA 6 disperse phase and the mechanical properties of PP-H/PA 6 composites. In general, the composites injection molded at a high temperature have lower mechanical properties in comparison with those injection molded at a low temperature.

关 键 词：聚丙烯 聚酰胺6 原位成纤复合 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]