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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (18): 2127-2132. 上一篇    下一篇

研究论文

新型阻燃聚丙烯腈共聚物在空气中的非等温热分解动力学

任元林*,a,b 程博闻a 徐 玲b 李振环b 蒋艾兵b 鲁友财b   

  1. (a天津工业大学纺织学院 天津 300160)
    (b天津工业大学天津市改性与功能纤维重点实验室 天津 300160)
  • 投稿日期:2009-01-20 修回日期:2009-03-25 发布日期:2009-12-31
  • 通讯作者: 任元林

Non-isothermal Decomposition Kinetics of Novel Fire Retarded Polyacrylonitrile Copolymer in Air

Ren, Yuanlin*,a,b Cheng, Bowena Xu, Lingb Li, Zhenhuanb Jiang, Aibingb
Lu, Youcaib   

  1. (a School of Textile, Tianjin Polytechnic University, Tianjin 300160)
    (b Tianjin Municipal Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin 300160)
  • Received:2009-01-20 Revised:2009-03-25 Published:2009-12-31
  • Contact: Ren, Yuanlin

被引次数

14

用O,O-二乙基-O-烯丙基硫代磷酸酯(DATP)与丙烯腈共聚合成了新型阻燃聚丙烯腈共聚物(FR-PAN), 对其在空气中的非等温动力学通过TG-DTG技术进行了研究, 并通过极限氧指数法(LOI)考查了FR-PAN的阻燃性能; 利用Kissinger方法和Flynn-Wall-Ozawa (FWO)方法计算出了FR-PAN热降解过程中的表观活化能; 采用Satava-Sestak方法通过对不同机理模型的选取, 确定了FR-PAN的热降解机理. 结果表明, 由Kissinger法和FWO法所计算得到的FR-PAN的表观活化能分别为119.62和123.99 kJ•mol－1; FR-PAN的热降解反应属于随机成核和随后增长机理, 其机理函数为G(α)＝－ln(1－α), 反应级数n＝1.

关键词: O,O-二乙基-O-烯丙基硫代磷酸酯, 阻燃聚丙烯腈, 热分解, 动力学

A novel fire retarded polyacrylonitrile copolymer (FR-PAN) was obtained via copolymerization of acrylonitrile with O,O-diethyl-O-allyl thiophosphate (DATP). The non-isothermal decomposition kinetics of the FR-PAN in O2 were studied by TG-DTG techniques, and the fire retardance of the FR-PAN was investigated by the limiting oxygen index (LOI) method. The activation energies of the major thermal decomposition of the FR-PAN were determined by using the Kissinger method and Flynn-Wall-Ozawa (FWO) method, respectively. With the selection of different mechanism models, the decomposition mechanism of the FR-PAN was obtained by using the Satava-Sestak method. The results show that the activation energies for the major thermal decomposition step of the FR-PAN are 119.62 kJ•mol－1 with the Kissinger method and 123.99 kJ•mol－1 with the FWO method, respectively. And the thermal decomposition mechanism of the major decomposition step of the FR-PAN is random nucleation and growth, with the mechanism function being G(α)＝－ln(1－α), and the reaction order being 1.

Key words: O,O-diethyl-O-allyl thiophosphate, fire retarded polyacrylonitrile, thermal decomposition, kinetics