摘要
为提高六硝基六氮杂异伍兹烷(CL-20)的安全性能,并保持其较高能量,以聚氨酯高聚物Estane为包覆剂,1,1-二氨基-2,2-二硝基乙烯(FOX-7)为含能降感成分,利用水悬浮包覆法制备了三种不同配比的CL-20/FOX-7基高聚物粘结炸药。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、差示扫描量热仪(DSC)、撞击感度测试仪以及摩擦感度测试仪对样品的形貌结构、晶型、热分解特性以及样品的机械感度进行测试分析,用电测法对三种配比高聚物粘结炸药(PBX)爆速进行测试。结果表明,CL-20/FOX-7基炸药颗粒包覆效果较好,且CL-20和FOX-7均未发生转晶。三种CL-20/FOX-7基PBX表观活化能比细化CL-20分别提高了17.12,32.87kJ·mol^-1和40.24kJ·mol^-1;活化焓(ΔH)较CL-20也明显提高;特性落高由细化CL-20的27.5cm分别提高到58.3,56.5,54.2cm。三种配比CL-20/FOX-7基PBX实测爆速分别为8474,8503,8577m·s^-1,与PBXN-5相当,但特性落高较PBXN-5提升了48.5%以上,炸药安全性能明显提升。
To improve the safety performance of hexanitrohexaazaisowurtzitane(CL-20) and maintain its higher energy,three kinds of CL-20/FOX-7 polymer bonded explosives(PBXs)with different formulation proportions were prepared by water suspen- sion coating method using polyurethane polymer Estane as coating agent and 1,1-diamino-2,2-dinitroethene(FOX-7)as energet- ic sensitivity-reducing component. The morphology structure,crystal form,thermal decomposition characteristic and impact and friction sensitivity of samples were tested and analyzed by scanning electron microscopy(SEM),X-ray diffractometer(XRD), differential scanning calorimeter(DSC),impact sensitivity tester and friction sensitivity tester. The detonation velocity of three kinds of PBXs was tested by an electrical measurement method. The results show that the explosive particles based on CL-20/ FOX-7 have better coating effect,and neither CL-20 nor FOX-7 has crystal transformation. The apparent activation energy of three kinds of PBXs are increased by 17.12,32.87 and 40.24 kJ·mol^-1 compared with refined CL-20. The enthalpies of activation (ΔH) of PBX samples are also significantly improved compared with CL-20. The characteristic drop height increases from 27.5 cm of refine CL-20 to 58.3,56.5 cm and 54.2 cm,respectively,compared with CL-20. The actual detonation velocities of three kinds of PBXs with different formulation proportions are 8474,8503 m·s^-1 and 8577 m·s^-1 ,respectively,which is equiva- lent to the detonation velocity of PBXN-5,but the characteristic drop height increases by more than 48.5% compared with PBXN-5,the safety performance of explosives is significantly improved.
作者
李小东
张锡铭
杨武
孙红燕
宋昌贵
王晶禹
LI Xiao-dong;ZHANG Xi-ming;YANG Wu;SUN Hong-yan;SONG Chang-gui;WANG Jing-yu(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2019年第7期587-593,I0005,共8页
Chinese Journal of Energetic Materials
基金
装备预研共用技术项目
