MnO_2对MPP/PEPA阻燃PP性能的影响  

Effect of MnO_2 on Properties of PP Retardanted by MPP/PEPA

作　　者：冯才敏[1,2] 刘洪波[1] 黄健光[1] 

机构地区：[1]顺德职业技术学院医学系,广东佛山528333 [2]中山大学化学与化学工程学院聚合物复合材料及功能材料教育部重点实验室,广东广州510275

出　　处：《现代塑料加工应用》2009年第6期16-19,共4页Modern Plastics Processing and Applications

基　　金：佛山市顺德区产学研究合作项目(2007CXY038);顺德职业技术学院科研项目(2008-KJ02)

摘　　要：采用多聚磷酸蜜胺(MPP)和笼状季戊四醇磷酸酯(PEPA)复配阻燃剂以及MnO_2为阻燃增效剂,制备了具有良好阻燃性能的无卤阻燃聚丙烯(PP),研究了MnO_2用量对PP阻燃和力学性能的影响。结果表明,添加少量的MnO_2即可显著提高材料的阻燃性能;当MPP,PEPA,MnO_2添加质量分数分别为12%,8%和2%时,材料的氧指数(LOI)高达32.0%,并具有较好的力学性能。Kissinger动力学分析结果表明,添加MnO_2可以催化MPP/PEPA间的酯化反应,改变材料的热降解途径。扫描电子显微镜(SEM)和热重分析(TGA)表明,MnO_2可以起到稳定炭层、促进成炭、增加炭层厚度作用。Halogen-free retardant PP was prepared by using MPP and PEPA as flame retardants and MnOz as synergistic agent. The effects of MnO2 content on flame retardancy and mechanical properties of PP were studied. It is found that a little quantity of MnO2 can improve the flame retardancy of PP remarkably, when the mass fraction of MPP, PEPA and MnO2 were 12%, 8% and 2% respectively, the LOI of material was 32.0%, and it has good mechanical properties. Kissinger kinetics analysis results reveal that MnO2 can catalyze esterification of MPP/PEPA, and change the pathway of thermal degradation of flame retardant PP. TGA and SEM results show that MnO2 can stabilize and thicken the char structure and increase the char residue of flame retardant PP.

关 键 词：聚丙烯 多聚磷酸蜜 胺笼状季戊四醇磷酸酯 二氧化锰 无卤阻燃 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]