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.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
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)
关键词
聚丙烯
阻燃
热分解动力学
阻燃机理
polypropylene
flame retardation
thermal degradation kinetics
flame retardant mechanism
