Influence of Accelerated Aging on Detonation Performance of Explosives |
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Authors: | GAO Da-yuan HUA Cheng WANG Xiang HAN Yong |
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Affiliation: | GAO Da-yuan,HUA Cheng,WANG Xiang,HAN Yong(Institute of Chemical Materials,China Academy of Engineering Physics,Mianyang 621900 Sichuan,China) |
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Abstract: | To understand the aging effects on detonation performances of explosives,an accelerated aging mechanism and effect of explosives were analyzed.Based on the thermo-gravimetric(TG) curves of explosives under the heat rate of 5,10 and 20 K·min-1,the thermal decomposition activation energy,pre-exponential factor,mechanism function and kinetic equation of the explosives were calculated by Ozawa’s equation and decomposition extents.Then,according to the derived kinetic equation,the density,composition and heat of formation of GI-1,PBX-1 and PBX-2 explosive in different decomposition extents were calculated at accelerated aging temperatures of 70 ℃ and 75 ℃,respectively.Furthermore,the detonation parameters of GI-1,PBX-1 and PBX-2 explosives were found out by means of VLWR code.The results show that after accelerated aging,the density are decrease,the detonation velocity and pressure are all decreased slightly. |
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Keywords: | applied chemistry explosives accelerated aging kinetics equation detonation parameter |
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