一种无卤阻燃聚丙烯的热分解动力学  

The Kinetics of Thermal Degradation of A Halogen-Free Flame-Retarded Polypropylene

作　　者：卢林刚[1] 张晴[2] 徐晓楠[3] 王大为[2] 

机构地区：[1]中国人民武装警察部队学院科学技术研究所 [2]中国人民武装警察部队学院研究生队 [3]中国人民武装警察部队学院消防工程系,河北廊坊065000

出　　处：《高分子材料科学与工程》2010年第11期39-43,共5页Polymer Materials Science & Engineering

基　　金："十一五"国家科技支撑计划项目(2006BAK06B06)

摘　　要：利用Kissinger、Flynn-Wall-Ozawa(FWO)及Coast-Redfern方法研究了聚丙烯(PP)和IFR/SiO2/PP体系的热分解动力学。结果表明,IFR/SiO2添加提高了PP的主分解阶段活化能,增强了PP阻燃性能。PP热分解机理函数g(α)=-ln(1-α),反应级数n=1,为随机成核和随后增长反应;IFR/SiO2/PP体系热分解机理函数为g(α)=1-(1-α)1/4,反应级数n=1/4。Thermal stability and thermal degradation kinetics of polypropylene （PP） and IFR/SiO2/PP were investigated by a conventional dynamic thermogravimetric analysis（TGA） under highly purity N2 atmosphere at different heating rates between 15 ℃/min and 35 ℃/min,and the thermal degradation activation energy of PP and IFR/SiO2/PP was determined by using Kissinger and Flynn-Wall-Ozawa method.It shows that the addition of IFR/SiO2/PP changes the degradation route of PP,enhances the thermal degradation activation energy and the flame retardance of PP.The thermal degradation kinetic mechanism and the isothermal kinetic equations of PP and IFR/SiO2/PP were determined by Coast-Redfern method.The thermal decomposition mechanism of PP is random nucleation reaction and the kinetic equation can be expressed as g（α）=-ln（1-α）,and the reaction order is n=1.The kinetic equation of IFR/SiO2/PP can be expressed as g（α）=1-（1-α）1/4,and the reaction order is n=1/4.

关 键 词：聚丙烯 阻燃 热分解动力学 阻燃机理 

分 类 号：TQ314.248[化学工程—高聚物工业]