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Citation: 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. Kinetic Behaviour of the Exothermic Decomposition Reaction of N-Guanylurea Dinitramide[J]. Acta Physico-Chimica Sinica, ;2008, 24(03): 453-458. doi: 10.3866/PKU.WHXB20080318 shu

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

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 Date: 14 August 2007
Available Online: 23 January 2008

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=10^18.49exp(-195500/RT)(1-α)^0.81+10^18.00exp (-177000/RT)α^1.29 (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.
- GUDN; Autocatalytic decomposition; Kinetic parameters; Critical rate of temperature rise; Thermal explosion; Non-isothermal DSC
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