物理化学学报 >> 2008, Vol. 24 >> Issue (03): 453-458.doi: 10.3866/PKU.WHXB20080318

研究论文 上一篇    下一篇

N-脒基脲二硝酰胺放热分解反应的动力学行为

高红旭; 张海; 赵凤起; 胡荣祖; 马海霞; 徐抗震; 仪建华; 徐司雨; 高茵   

  1. 西安近代化学研究所, 西安 710065; 西北大学数学系, 西安 710069; 西北大学化工学院, 西安 710069
  • 收稿日期:2007-08-14 修回日期:2007-12-11 发布日期:2008-03-10
  • 通讯作者: 赵凤起 E-mail:npecc@163.com

Kinetic Behaviour of the Exothermic Decomposition Reaction of N-Guanylurea Dinitramide

GAO Hong-Xu; ZHANG Hai; ZHAO Feng-Qi; HU Rong-Zu; MA Hai-Xia; XU Kang-Zhen; YI Jian-Hua; XU Si-Yu; GAO Yin   

  1. Xi’an Modern Chemistry Research Institute, Xi’an 710065, P. R. China; 2Department of Mathematics, Northwest University, Xi’an 710069, P. R. China; 3College of Chemical Engineering, Northwest University, Xi’an 710069, P. R. China
  • Received:2007-08-14 Revised:2007-12-11 Published:2008-03-10
  • Contact: ZHAO Feng-Qi E-mail:npecc@163.com

摘要: 用DSC和微热量仪研究了N-脒基脲二硝酰胺(GUDN)的放热分解反应动力学行为和比热容, 计算得到程序升温下GUDN主放热分解反应的动力学参数(活化能Ea和指前因子A)、自加速分解温度(TSADT)、绝热条件下达到最大分解反应速率的时间(tTMRad)和至爆时间(tTIad). 结果表明, 在非等温DSC条件下, GUDN的热分解过程可用经验级数自催化动力学方程dα/dt=1018.49exp(-195500/RT)(1-α)0.81+1018.00exp(-177000/RT)α1.29(1-α)0.71描述. 热分解转热爆炸的临界温升速率为0.1236 K·h-1. 所得的TSADT、tTMRad和tTIad值分别为473.95 K、2.24 s和3.51 s.

关键词: N-脒基脲二硝酰胺, 自催化分解, 动力学参数, 临界温升速率, 热爆炸, 非等温DSC

Abstract: The kinetic behaviour of the exothermic decomposition reaction and the specific heat capacity of N-guanylurea dinitramide (GUDN) were determined by DSC and mircocalorimeter. Its kinetic parameters of the major exothermic decomposition reaction in a temperature-programmed mode [the apparent activation energy (Ea) and pre-exponential factor (A)], self-accelerating decomposition temperature (TSADT), time to maximum rate (tTMrad), and time-to-ignition (tTIad) under adiabatic conditions were calculated. The results showed that under non-isothermal DSCconditions, the thermal decomposition of GUDN could be described by the empiric-order autocatalytic equation: dα/dt=1018.49exp(-195500/RT)(1-α)0.81+1018.00exp (-177000/RT)α1.29 (1-α)0.71, and the value of the critical rate of temperature rise in GUDN was 0.1236 K·h-1 when the decomposition reaction converted into thermal explosion. The values of TSADT, tTMRad, and tTIad were 473.95 K, 2.24 s, and 3.51 s, respectively.

Key words: GUDN, Autocatalytic decomposition, Kinetic parameters, Critical rate of temperature rise, Thermal explosion, Non-isothermal DSC

MSC2000: 

  • O642