EP含量对PP/PP-g-MAH/EP微孔发泡复合材料发泡行为及力学性能的影响  

Effects of EP Content on the Foaming Behaviors and Mechanical Properties of PP/PP-g-MAH/EP Microcellular Foams

作　　者：高萍[1,2] 王醴均[2] 蒋团辉[2] 龚维[2,3] 何力[1,2] 

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014 [3]贵州师范大学材料与建筑工程学院,贵州贵阳550014

出　　处：《高分子材料科学与工程》2016年第1期58-62,共5页Polymer Materials Science & Engineering

基　　金：黔科合重大专项字(2012)6023号;白科合同[2014]82号;黔科合外G字[2014]7016号;黔科合人才团队[2014]4006号

摘　　要：采用化学发泡法制备了聚丙烯/聚丙烯接枝马来酸酐/环氧树脂(PP/PP-g-MAH/EP)微孔复合发泡材料,研究了EP粉体含量对其发泡行为及力学性能的影响。结果表明,EP粉体在发泡过程中起异相成核作用,且与PP-g-MAH反应形成的交联网络结构提高了复合材料的熔体强度,从而显著改善了泡孔结构。随着EP含量增加,微孔发泡材料的拉伸强度、弯曲强度和冲击强度都呈现先增大后减小的趋势。当EP含量为5%时,复合材料的泡孔尺寸最小,泡孔密度最大,泡孔分布最均匀,微孔发泡材料的冲击强度最大;当EP含量为1%时,拉伸强度、弯曲强度最大,发泡材料的综合力学性能最佳。The polypropylene / polypropylene grafted maleic anhydride / epoxy（ PP / PP-g-MAH / EP） microcellular foam composites were prepared by chemical foaming method. This study focused on effects of the EP powder content on the foaming behaviors and mechanical properties. The results indicate that EP powder acts as heterogeneous nucleation in the foaming process. Meanwhile it can also react with PP-g-MAH,formed a cross-linked structure,and thus improving the melt strength of composites. As a result,the cell structures are significantly improved. With the increase of EP content,the tensile strength,flexural strength and impact strength of microcellular foam materials increase to the maximum and then followed by decrease. With the addition of 5% EP,the composites obtain the minimum cell size,the highest cell density,and the most homogeneous distribution of cells as well as the highest impact strength. With the addition of 1% EP,the composites have the maximum tensile strength and flexural strength,and the mechanical properties are the best.

关 键 词：聚丙烯 微孔发泡 环氧树脂 发泡行为 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]