多单体反应挤出PP/胶粉共混材料的研究  

Study on Polypropylene/Waste Rubber Powder Blend by Reactive Extrusion with Multi-monomer

作　　者：鄢志兵[1] 陶国良[1] 贾永鹏[1] 陶宇[1] 

机构地区：[1]江苏工业学院材料学院,江苏常州213164

出　　处：《中国塑料》2008年第10期81-84,共4页China Plastics

摘　　要：按一定的次序将单体马来酸酐(MAH)、苯乙烯(St)、引发剂过氧化二异丙苯(DCP)、聚丙烯(PP)、废胶粉等在高速混合机中混合均匀后,在双螺杆挤出机中就地反应增容制备 PP/胶粉共混材料。讨论了 MAh/St/DCP 三者的含量对 PP/胶粉共混材料力学性能的影响;红外光谱(FTIR)分析证明双单体成功接枝于 PP 大分子链中。通过扫描电镜分析了一步法反应增容对 PP/胶粉共混物界面的影响。结果表明,一步法反应增容改善了共混物的界面相容性,当 PP、胶粉、DCP、MAH、St 的配比为70/30/0.1/1.5/1.5时,PP/胶粉共混物的拉伸强度和悬臂梁缺口冲击强度达到最佳。Maleic anhydride, styrene （St）, dicumyl peroxide （DCP）, waste rubber powder （WRP）, and polypropylene （PP） were mixed evenly in a high-speed mixer and then subjected to an in situ reaction in a twin screw extruder. Influences of loadings of MAH/St/DCP on mechanical properties were discussed in detail. FTIR showed that MAH and St were successfully grafted onto PP. The effects of grafting on the microstructure and phase interfaces were analyzed based on the scanning electron micro： scope （SEM） of the sections. The increased notch impact strength and tensile strength were attributed to the improved interface. The optimal recipe was found to be PPAVRP/DCP/MAH/St = 70/30/0.1/ 1.5/1.5.

关 键 词：聚丙烯 胶粉 一步法 反应挤出 增容剂 

分 类 号：TQ320.663[化学工程—合成树脂塑料工业]