竹纤维/马来酸酐接枝聚丙烯/聚丙烯复合材料的结构和性能研究  

Structure and Properties of BF /PP-g-MA /PP Composites

作　　者：周松[1] 陈浩[1] 王刚毅 梁斌 夏世福 王春华[1] 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500 [2]四川正蓉实业有限公司,四川德阳618000

出　　处：《塑料工业》2013年第11期57-61,65,共6页China Plastics Industry

基　　金：四川省高等学校油气田材料重点实验室资助项目(12YQT001)

摘　　要：采用双螺杆挤出和注射成型制备了竹纤维/聚丙烯(BF/PP)和竹纤维/马来酸酐接枝聚丙烯/聚丙烯(BF/PP-g-MA/PP)复合材料。用SEM、DSC、XRD和TG等观察和表征了复合材料的形貌和结构,测试了复合材料的流动性能和力学性能。研究表明,复合材料的韧性、力学性能、熔体加工性能、结晶行为、热稳定性与共混物的组成及其微观形貌密切相关。添加经碱处理的竹纤维能使聚丙烯的刚性增大,但导致力学强度、冲击韧性和熔体加工性能明显降低。添加PP-g-MA使30%BF/PP复合材料拉伸和弯曲强度明显增加,冲击强度改善,主要源于竹纤维与聚丙烯基体之间形成了较强界面黏附。BF/PP-g-MA/PP(30/7.5/62.5)复合材料具有较高的综合力学性能和较好的加工性能。The BF/PP and BF/PP-g-MA/PP composites were prepared by a twin screw extruder and injection molding. The morphology and structure were analyzed by SEM, DSC, XRD, TG and melt flow index, mechanical testing, The results demonstrated that the toughness, mechanical properties, melt processability, crystallization behavior and thermal stability of the composites strongly depended on the blend compositions and blend micro-morphology. The stiffness of PP increased with the addition of alkali treated BF, however the mechanical strength, toughness and melt processability of the BF/PP composites decreased significantly. The significant increase in tensile and flexural strength, the improvement of impact strength of the 30 wt% BF/PP composites can be explained on the basis of the better interfacial adhesion between BF and PP matrix caused by incorporation of PP-g-MA. The better comprehensive properties can be obtained for the 30/7.5/62.5 combination of BF/PP-g-MA/PP composite with better melt processability.

关 键 词：聚丙烯 竹纤维 马来酸酐接枝聚丙烯 结构和性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]