杂质对DNTF的热分解危险性研究

采用差示扫描量热仪(DSC)分别研究了纯度98.6%和纯度99.5%DNTF在不同升温速率下的热分解行为,利用Kissinger公式、Ozawa公式、热力学关系式和Zhang-Hu-Xie-Li公式分别计算了两种纯度DNTF热分解反应的表观活化能和热力学参数,以及热安全性参数。结果表明:98.6%DNTF和99.5%DNTF热分解反应的表观活化能分别为159.28kJ/mol和192.05kJ/mol;98.6%DNTF和99.5%DNTF热爆炸临界温度分别为538.91K和540.39K;98.6%DNTF和99.5%DNTF自加速分解温度分别为523.75K和527.75K。杂质的存在对DNTF的热安全性有一定的影响,但少量杂质的存在并不会对DNTF的热安全性产生较大的影响。

Risk of Impurities on Thermal Decomposition of DNTF

The thermal decomposition behavior of the DNTF with purity 98.6% and99.5% was studied by differential scanning model calorimeter at different heating rate.The apparent activation energy and thermodynamic parameters for thermal decomposition reaction of the DNTF with purity 98.6% and 99.5%,and thermal safety parameters of the DNTF with purity 98.6% and 99.5% were calculated by Kissinger’s formula,Ozawa’s formula,thermodynamic reaction formula and Zhang-Hu-Xie-Li formula,respectively.The results show that the apparent activation energy for the thermal decomposition reaction of the DNTF with purity 98.6% and 99.5% are 159.28kJ/mol and 192.05kJ/mol,respectively.The critical temperature of thermal explosion of the DNTF with purity 98.6% and 99.5% are 538.91K and 540.39K,respectively.The self-accelerating decomposition temperature of thermal explosion of the DNTF with purity 98.6% and 99.5% are 523.75K and 527.75K,respectively.The presence of impurities has a certain impact on the thermal safety of DNTF,but the presence of less impurities does not have a greater impact on the thermal safety of DNTF.