Zhang Jiao-qiang, Gao Hong-xu, Su Li-hong, Hu Rong-zu, Zhao Feng-qi, Wang Bo-zhou
Department of Applied Chemistry, Northwestern Polytechnical University, Xi'an, Shaanxi, PR China.
J Hazard Mater. 2009 Aug 15;167(1-3):205-8. doi: 10.1016/j.jhazmat.2008.12.098. Epub 2008 Dec 31.
The thermal behavior and decomposition reaction kinetics of 2-nitroimino-5-nitro-hexahydro-1,3,5-triazine (NNHT) were investigated by TG-DTG and DSC under atmospheric pressure and flowing nitrogen gas conditions. The results show that the thermal decomposition process of NNHT has two mass loss stages. The exothermic decomposition reaction mechanism obeys chemical reaction rule. The kinetic parameters of the reaction are E(a)=131.77 kJ mol(-1), lg(A/s(-1))=12.56, respectively. The kinetic equation can be expressed as: dalpha/dt = 10(12.86)(1-alpha)(3/2)3(-1.5849 x 10(4)/T)). The critical temperature of thermal explosion of NNHT obtained from the peak temperature (T(p)) is T(bp)=467.22K. The entropy of activation (DeltaS( not equal)), enthalpy of activation (DeltaH( not equal)), and free energy of activation (DeltaG( not equal)) of the reaction are -7.978 J mol(-1)K(-1), 127.99 kJ mol(-1) and 131.62 kJ mol(-1), respectively.
在常压和流动氮气条件下，采用热重-微商热重（TG-DTG）和差示扫描量热（DSC）法研究了2-硝基亚氨基-5-硝基六氢-1,3,5-三嗪（NNHT）的热行为及分解反应动力学。结果表明，NNHT的热分解过程有两个质量损失阶段。放热分解反应机理遵循化学反应规律。反应的动力学参数分别为E(a)=131.77 kJ mol(-1)，lg(A/s(-1))=12.56。动力学方程可表示为：dα/dt = 10(12.86)(1-α)(3/2)3(-1.5849×10(4)/T))。由峰值温度（T(p)）得到的NNHT热爆炸临界温度为T(bp)=467.22K。反应的活化熵（ΔS(≠)）、活化焓（ΔH(≠)）和活化自由能（ΔG(≠)）分别为-7.978 J mol(-1)K(-1)、127.99 kJ mol(-1)和131.62 kJ mol(-1)。
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