摘要
为了研究粘结剂对FOX-7基PBX的影响,利用分子动力学(MD)模拟方法分别建立了以Estane、F2602、EVA为粘结剂的FOX-7基PBX复合粒子模型,计算了炸药体系与不同粘结剂体系间的结合能;采用溶液-水悬浮法制备了3种不同粘结剂的FOX-7基PBX,并对FOX-7及制得样品的晶体形貌、晶型结构、热性能和安全性能进行了表征和测试。结果表明:Estane和EVA与FOX-7单质炸药的相容性优于F2602,前两者形成的PBX更稳定。体系以EVA作粘结剂时,PBX粒子形貌最佳。3种PBX的衍射峰均与原料α-FOX-7一致;3种PBX样品的热稳定性较原料均有提高,其中Estane粘结剂包覆的FOX-7基PBX样品活化能较FOX-7原料提高了64.7 kJ/mol,热爆炸临界温度也得到了提升,说明使用Estane有助于提高FOX-7基PBX的热稳定性。与原料相比,EVA包覆后的PBX机械感度降低最为明显,其撞击能量较原料提高了12.5 J,摩擦荷重增值96 N。
In order to study the effect of binder on FOX-7-based PBX,the composite particle models of FOX-7-based PBX with Estane,F 2602,and EVA as binders were established by molecular dynamics(MD)simulation method,respectively,and the binding energies between the explosive system and different binder systems were calculated;FOX-7-based PBXs with three different binders were prepared by solution-water suspension method.The crystal morphology,crystal structure,thermal and safety properties of FOX-7 and the prepared samples were also characterized and tested.The results showed that Estane and EVA are more compatible with FOX-7 monolithic explosives than F 2602,and the PBX formed by the former two is more stable.The best PBX particle morphology is obtained when EVA is used as the binder in the system,and the diffraction peaks of all three PBXs are consistent with that of the raw materialα-FOX-7.The thermal stability of the three PBX samples is improved compared with that of the raw material,in which the activation energy of the Estane binder-coated FOX-7-based PBX samples is increased by 64.7 kJ/mol compared with that of the FOX-7 raw material,and the critical temperature of the thermal explosion is also improved.This indicates that the use of Estane helps to improve the thermal stability of FOX-7-based PBX.Compared with the feedstock,the EVA-coated PBX shows the most significant reduction in mechanical susceptibility,with a 12.5 J increase in impact energy and a 96 N increase in friction load value.
作者
解莹颖
李小东
胡双启
武文瑜
李美洁
XIE Yingying;LI Xiaodong;HU Shuangqi;WU Wenyu;LI Meijie(School of Environmental and Safety Engineering,North University of China,Taiyuan 030051,China;Shanxi Engineering Technology Research Center for Ultrafine Powder,Taiyuan 030051,China)
出处
《兵器装备工程学报》
北大核心
2025年第7期319-326,共8页
Journal of Ordnance Equipment Engineering
关键词
FOX-7
MD模拟
溶液-水悬浮法
粘结剂
高聚物粘结炸药
FOX-7
molecular dynamics simulation
solution-water suspension method
binder
polymer bonded explosive
