The thermal decomposition and combustion properties of DAP-4/FG composite materials

To address the issue that the high thermal decomposition threshold of ammonium perchlorate-based molecular perovskite energetic material (H2dabco)[NH4(ClO4)3] (DAP-4) hinders its application in solid propulsion, fluorinated graphene (FG) was utilized as an additive in the fabrication of the DAP-4/FG composite materials in this study. The investigation focused on their thermal behavior and combustion performance. The results show that FG has an excellent catalytic effect on the thermal decomposition of DAP-4. The incorporation of FG resulted in a reduction of the thermal decomposition temperature (Tp) and activation energy (Ea) of DAP-4 by 35.5 ℃ and 54.6 kJ/mol, respectively. The flame of the DAP-4/FG composite exhibits a bright yellow color, with a significantly greater height compared to that of DAP-4, and an extended combustion duration of 326 ms. Moreover, the combustion heat for the DAP-4/FG composite was measured at 10,466 kJ/kg, which is markedly higher than that of DAP-4. These findings indicate that the composite possesses outstanding thermal decomposition and combustion characteristics, suggesting promising application potential.