Molecular perovskite energetic material DAP-4 was synthesized by chemical methods,and it was characterized by using SEM,EDS,XRD,IR,XPS,and elemental analysis.The enthalpy of formation(ΔHf)and the thermal decomposition per-formance of DAP-4 were tested by using the oxygen bomb calorimeter and DSC technology.Its mechanical sensitivity,detona-tion performance,and combustion performance were also carried out.The DAP-4 was used in CMDB propellant,and the con-stant volume combustion and the constant pressure combustion performance were tested.The results show that the enthalpy of formation of DAP-4 was determined as 278.6kJ/mol.At a heating rate of 20 ℃/min,the peak temperature of thermal de-composition reached 392.5 ℃,the activation energy of thermal decomposition(EK)was 247.2kJ/mol,and the critical tem-perature of thermal explosion(Tb)reached 631.6K,which was much higher than that of HMX.The impact sensitivity of DAP-4 was similar to that of TNT,and the friction sensitivity was closed to CL-20.The detonation velocity of DAP-4 was as high as that of RDX.The chemical energy storage,work capacity,and metal acceleration ability of DAP-4 and its mixed explo-sives were significantly higher than those of RDX and HMX,which was closed to CL-20.The constant volume combustion ex-periment showed that the CMDB-1 propellant containing DAP-4 had the fastest burning rate,the highest combustion pressure,and the highest pressurization rate.The constant pressure combustion data showed that the combustion temperature of CMDB-1 propellant was the highest,which can reach 3 501 ℃.
关键词
分子钙钛矿含能材料/DAP-4/生成焓/机械感度/爆轰性能/燃烧性能
Key words
molecular perovskite energetic material/DAP-4/enthalpy of formation/mechanical sensitivities/detonation per-formance/combustion performance
维普
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