中国塑料 ›› 2008, Vol. 22 ›› Issue (03): 42-45.DOI: 10.19491/j.issn.1001-9278.2008.03.009

• 材料与性能 • 上一篇    下一篇

聚丙烯/蒙脱土复合材料的热重分析

陈奎,杨瑞成,岳桂杰   

  1. 1兰州城市学院培黎工程技术学院,甘肃兰州730070;2兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050
  • 收稿日期:2007-09-10 修回日期:1900-01-01 出版日期:2008-03-26 发布日期:2008-03-26

Thermogravimetric Analysis of Polypropylene/Organic Montmorillonite Composites

CHEN Kui,YANG Rui-cheng,YUE Gui-jie   

  1. 1. College of Peili Engineering Technology, Lanzhou City University, Lanzhou 730070, China; 2. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
  • Received:2007-09-10 Revised:1900-01-01 Online:2008-03-26 Published:2008-03-26
  • Contact: CHEN Kui

摘要: 利用热重分析技术对聚丙烯和含4%蒙脱土的聚丙烯蒙脱土(PP/OMMT)复合材料的热分解行为进行了研究。运用Qzawa法计算了PP和PP/OMMT复合材料的热分解动力学参数,并用Coats-Redfem法研究了热分解动力学机理。结果表明,PP和PP/OMMT复合材料的热分解一步完成;OMMT的加人,使得PP的初始失重温度较高;失重22%以前,复合材料的活化能大于纯PP,失重率大于22%后,复合材料的活化能低于PP。失重率在30%一80%时,PP和PP/OMMT热分解反应的机理函数分别为Valensi方程(n=1/2)和Mampel Po~法则,对应机理为二维扩散和幂函数法则。

关键词: 聚丙烯, 蒙脱土, 热分解, 动力学

Abstract: Thermogravimetric analysis was used to study the polypropylene(PP) and polypropylene/montmorillonite (PP/OMMT) composites. the thermal decomposition kinetics parameters of PP and PP/OMMT composites (4 wt% montmorillonite) was calculated by means of Qzawa method at different heating rates of 10,20,30 and 40 K/min in nitrogen atmosphere,thermal decomposition kinetics mechanism was studied by Coats-Redfern method. thermal decomposition of both PP and PP/OMMT composite were completed in one step. the activation energy of PP was lower than that of composites before 22 wt% mass loss, and higher after 22 wt% mass loss. the most probable kinetic function of the thermal decomposition of PP and PP/OMMT composites was the Valensi function with n=1/2 and Mampel Power theorem with n=1 /4.

Key words: polypropylene, montmorillonite, thermal decomposition, kinetics