Thermal Sensitivity of HMX Crystals and HMX‐Based Explosives Treated under Various Conditions
Thermal Sensitivity of HMX Crystals and HMX‐Based Explosives Treated under Various Conditions
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DOI：
10.1002/prep.200800010
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
Chaoyang Zhang;Peng Qiang;Liyan Wang;Xiaochuan Wang
中科院分区：
文献类型：
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作者：
Chaoyang Zhang;Peng Qiang;Liyan Wang;Xiaochuan Wang
五秒爆炸点（5 - SEP）测试和扫描电镜（SEM）检测表明，不同处理条件下的HMX晶体和HMX基炸药具有不同的热敏度。也就是说，HMX晶体的杂质含量越高，粒度越小，完整性越差，热敏性越强。在HMX中加入金属或金属氧化物颗粒，特别是纳米颗粒，也可以增强其热敏性。同时，用聚合物包覆HMX晶体形成完美的PBX并保持其完好无损，有助于降低其热敏性。此外，温度老化HMX的热敏性随其颗粒完整性的不同而不同。因此可以得出，提高HMX晶体的表面能或使HMX分子在较低温度下更活跃地分解的条件会提高HMX的热敏性。此外，在不同条件下处理的HMX的热敏度的变化通常比其机械敏度的变化更为温和。
The Five‐Second Explosion Point (5‐SEP) tests and the SEM detections in this research showed that the HMX crystals and the HMX‐based explosives treated under different conditions can possess different thermal sensitivities. That is to say, higher impurity, smaller granularity, and worse integrity of HMX crystals can make them more thermally sensitive. The addition of metal or metal oxide particles, especially nanoparticles to HMX can also enhance its thermal sensitivity. Meanwhile, coating of HMX crystals with polymers to form perfect PBX and to keep them undamaged are helpful to decrease their thermal sensitivity. Furthermore, the thermal sensitivity of temperature‐aged HMX changes differently in terms of the integrity of its particles. Therefore, it can be concluded that conditions which increase the surface energy of HMX crystals or which make the HMX molecules more active to decompose at lower temperature will increase the thermal sensitivity of HMX. Additionally, the variation in the thermal sensitivity of HMX treated under different conditions is generally more temperate than that of its mechanical sensitivity.