PP/层离状双氢氧化物复合材料的性能研究  

Properties of PP/Layered Double Hydroxide Composites

作　　者：于玲[1] 张玉华[1] YU Ling;ZHANG Yu-hua(Henan Polytechnic Institute,Nanyang 473000,China)

机构地区：[1]河南工业职业技术学院,河南南阳473000

出　　处：《塑料工业》2021年第8期123-127,共5页China Plastics Industry

基　　金：河南省科技厅自然科学基金项目(9412018y1618)。

摘　　要：以硝酸镁、硝酸铝合成镁铝层状双氢氧化物(MgAl-LDH),十二烷基硫酸钠(K12)以共沉淀方式对其进行有机改性,得到的改性物MgAl-LDH(K12)再与聚丙烯树脂(PP)熔融混炼制备出PP/MgAl-LDH复合材料。通过傅里叶红外光谱分析、X射线衍射分析证实,MgAl-LDH(K12)的片层发生剥离,成功进入到PP基体中。热重分析结果显示PP/MgAl-LDH(K12)的初始降解温度为240℃,高于纯PP 50℃。燃烧性能分析结果表明,PP/MgAl-LDH(K12)最大热释放速率低于纯PP基体,总热释放量无显著差异;MgAl-LDH(K12)用量2.5 phr时,复合材料的氧指数达到最高值21.1%;PP/MgAl-LDH材料通过水平燃烧测试,故MgAl-LDH(K12)对聚丙烯基体有一定的阻燃作用。Synthesis of magnesium aluminum layered double hydroxides(MgAl-LDH)from magnesium nitrate and aluminum nitrate,organically modified LDH with sodium lauryl sulfate by co-precipitation,and melt and knead with polypropylene(PP)matrix to obtain PP/MgAl-LDH.It was characterized by Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD).It is confirmed that the sheet of MgAl-LDH(K12)are peeled off and successfully penetrated into the polypropylene matrix.The thermogravimetric(TG)analysis shows that the initial degradation temperature of PP/MgAl-LDH(K12)is 240℃,which is higher than that of pure PP by 50℃.The combustion performance analysis shows that the maximum heat release rate of PP/MgAl-LDH(K12)is lower than that of the pure PP matrix,and the total heat release has no significant difference.When the amount of MgAl-LDH(K12)is 2.5 phr,the limit oxygen index(LOI)value of the composite material could reach the highest value of 21.1%.PP/MgAl-LDH material has passed the horizontal combustion test,so MgAl-LDH(K12)has a certain flame retardant effect on the polypropylene matrix.

关 键 词：聚丙烯 层间材料 燃烧性能 

分 类 号：TQ325[化学工程—合成树脂塑料工业]