PP-g-MAH改性SGF/PP泡沫复合材料的结构与力学性能研究  

Investigation on the Cellular Structure and Mechanical Properties of SGF/PP Foam Composites Modified with PP-g-MAH

作　　者：杨继年[1,2] 李子全[2] 

机构地区：[1]安徽理工大学材料科学与工程学院,安徽淮南232001 [2]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《材料工程》2012年第11期57-60,65,共5页Journal of Materials Engineering

基　　金：江苏省自然基金资助项目(BK2009379);安徽理工大学青年教师科学研究基金资助(QN201116);安徽理工大学博士启动基金(2010-11060)

摘　　要：采用型内二次发泡工艺制备了马来酸酐接枝聚丙烯(PP-g-MAH)共混改性短玻璃纤维(SGF)/聚丙烯(PP)泡沫复合材料,考察了PP-g-MAH的含量对复合材料的泡孔形貌、微观结构和力学性能的影响。结果表明:PP-g-MAH的引入改善了泡沫体的发泡效果,平均孔径减小了约35%,泡孔密度提高近4倍且分布均匀;偶联剂的表面包覆和PP-g-MAH的共同作用改善了SGF与PP的相容性,显著增强了两者的界面结合;随SGF含量增加,SGF/PP泡沫复合材料的抗弯强度先增大后减小,而冲击强度则呈现先急剧增加而后趋缓的变化趋势。The short glass fiber（SGF）/polypropylene（PP） foam composites modified with maleic anhydride grafted PP（PP-g-MAH） were prepared via post-foaming process in designed dies.The influence of PP-g-MAH content on the cellular morphologies,microstructures and mechanical properties of composites were investigated.The results show that the outstanding improvement in foaming effect is realized by the addition of PP-g-MAH with a 35% reduction for average cell size and nearly four-fold increase in cell density.The compatibilities between SGF and PP are improved and their interfacial adhesion is enhanced significantly by the surface pretreatment of coupling agent as well as PP-g-MAH.The flexural strength of SGF/PP foam composites is increased first and then decreased.However,the impact strength exhibits the trend of rapid increasing and then moderating with the increase of PP-g-MAH.

关 键 词：聚丙烯 泡沫复合材料 界面结合 力学性能 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]