Improving Friction Sensitivity of Molecular Perovskite Energetic Material DAP-4 by Polymer Binders Coated

The high detonation and thermostability of the molecular perovskite energetic material DAP-4 attracted a lot of interest, but its high friction sensitivity hindered its applicability. It is critical to minimize the friction sensitivity of DAP-4 for future applications. DAP-4-based composites with core-shell structures coated by polymer binders were devised and manufactured in this study. DAP-4 was discovered to be polymer binder compatible, and the thermal breakdown temperature remained constant at 380°C. The friction sensitivity of DAP-4-based core-shell composites increased from 36 N (raw DAP-4) to 60 N (DAP-4@Estane-5703, DAP-4@F2602, and DAP-4@F2311) when 10% polymer binders were added as shell-structured layers. Furthermore, their theoretical detonation performance was calculated, and each sample demonstrated superior performance. Among them, the theoretical detonation velocity of DAP-4@F2602 reached 8081 m/s, and the heat of detonation was 5.118 kJ/kg. This provided proof-of-concept work for increasing the mechanical safety of molecular perovskite energetic materials.