Preparation and Performance Characterization of Molecular Perovskite.

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 (AHf) 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 °C /min, the peak temperature of thermal de-composition reached 392. 5 °C, the activation energy of thermal decomposition (fK) 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 °C . [ABSTRACT FROM AUTHOR]