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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (17): 1892-1896. 上一篇    下一篇

研究论文

N,N'-二(5,5-二甲基-2-磷杂-2-硫代-1,3-二噁烷-2-基)乙二胺的热分解动力学研究

任元林*, 程博闻, 张金树   

  1. (天津工业大学天津市纤维改性及功能纤维重点实验室 天津 300160)
  • 投稿日期:2006-11-16 修回日期:2007-02-07 发布日期:2007-09-14
  • 通讯作者: 任元林

Study on Thermal Decomposition Kinetics of N,N'-Bis- (5,5-dimethyl-2-phospha-2-thio-1,3-dioxan-2-yl) ethylene diamine

REN Yuan-Lin*; CHENG Bo-Wen; ZHANG Jin-Shu   

  1. (Tianjin Municipal Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic Univer-sity, Tianjin 300160)
  • Received:2006-11-16 Revised:2007-02-07 Published:2007-09-14
  • Contact: REN Yuan-Lin

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以TG-DTG为手段, 研究了N,N'-二(5,5-二甲基-2-磷杂-2-硫代-1,3-二噁烷-2-基)乙二胺(DPTDEDA)在氮气气氛中的热分解动力学, 利用 Kissinger法、Flynn-Wall-Ozawa(FWO)法对DPTDEDA进行了动力学分析, 求出了该物质的热分解动力学参数, 同时利用Satava-Sestak法研究了该物质的热分解机理. 结果表明, Kissinger法所求得的表观活化能为137.37 kJ•mol－1, 指前因子ln A＝28.00; Flynn-Wall-Ozawa法所求得的活化能为139.83 kJ•mol－1. DPTDEDA的热分解机理为相边界反应, 其动力学方程为G(α)＝1－(1－α)4, 反应级数n＝4.

关键词: N,N'-二(5,5-二甲基-2-磷杂-2-硫代-1,3-二噁烷-2-基)乙二胺, 热分解动力学, 活化能, 机理

The thermal decomposition kinetics of the N,N'-bis(5,5-dimethyl-2-phospha-2-thio-1,3-di- oxan-2-yl) ethylene diamine (DPTDEDA) in N2 were studied by TG-DTG techniques. The kinetic parameters, including the activation energy and frequency factor of the decomposition process for the title compound were calculated through the Kissinger and Flynn-Wall-Ozawa(FWO) method and the thermal decomposition mechanism of DPTDEDA was also studied with the Satava-Sestak method. The results show that the activation energy and pre-exponential factor are 137.37 kJ•mol－1 and 1.45×1012 s－1 with the Kissinger method and 139.83 kJ•mol－1 with the Flynn-Wall-Ozawa method respectively. The thermal decomposition mechanism of DPTDEDA is phase boundary reaction and the kinetic equation can be expressed as G(α)＝1－(1－α)4, and the reaction order is n＝4.

Key words: N,N'-bis(5,5-dimethyl-2-phospha-2-thio-1,3-dioxan-2-yl)ethylene diamine, thermal decomposition kinetics, activation energy, mechanism