新型含能材料NOG_2 Tz对HMX热分解行为的影响

Effects of Novel Energetic Material NOG2Tz on Thermal Decomposition Behavior of HMX

采用差示扫描量热法(DSC)测试了奥克托今(HMX)和3,6-双(3-硝基-1,2,4-噁二唑-5-胍基)-1,2,4,5-四嗪(NOG2Tz)不同质量比混合炸药的分解温度。以多重升温速率DSC研究了HMX纯品及混合炸药(80%HMX+20%NOG2Tz)的热行为,计算了其表观活化能、指前因子、自加速分解温度、热爆炸临界温度。结果表明,当HMX的质量分数为80%时,混合炸药的分解峰温较纯品HMX升高2℃,表观活化能增加约70 kJ·mol-1,混合炸药相容性较好,表明加入定量NOG2Tz(<50%)可以提高HMX的热安定性。

The decomposition temperatures of composite explosives（ HMX＋NOG2 Tz）in different mass proportions were measured by differential scanning calorimetry（ DSC ）. The detonation velocities of composite explosives were calculated by an empirical equation. The thermal behavior of the composite explosive 9#（80%HMX ＋20%NOG2 Tz）was studied by DSC at different heating rates. The apparent activation energy and pre-exponential factor of the exothermic decomposition reaction,the temperature（Te0） of the extrapolated onset in heating rate !→0,and the critical temperature of thermal explosion（Tb）were calculated. The results show that the decomposition peak temperature of the composite explosive 9# increases by 2 ℃and the apparent activation energy by 70 kJ·mol-1 over the pure HMX. It indicates that the addition of NOG2 Tz（〈50%）can improve the thermal stability of HMX.