Energetic materials have been used over time in civil and military applications. Concomitantly, studies were conducted focusing on the combustion mechanisms of these materials, including their kinetic and thermodynamic behavior during firing. The objective of this work was to systematically study the mechanisms of thermal decomposition of ammonium dinitramide (ADN), and ADN formulated as a solid composite propellant with glycidyl azide polymer (GAP), through reactive molecular dynamics simulations. The main reactions of the mechanisms were elucidated and analyzed, and the Arrhenius parameters were determined for the global processes. Calculated activation energies for the systems were 127.84 and 354.72 kJ/mol for ADN and ADN/GAP, respectively. Comparison to literature data shows up to 14% of deviation, which proves the methodology useful for predictions and kinetic analyzes of combustion/pyrolysis reactions of energetic materials.
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Gonçalves, R.F.B., Gouvêa, L.H., Almeida, L.E.N. et al. RMD simulations of ADN and ADN/GAP-based propellant. J Braz. Soc. Mech. Sci. Eng. 43, 118 (2021). https://doi.org/10.1007/s40430-021-02823-x
- Ammonium dinitramide
- Glycidyl azide polymer
- Reactive molecular dynamics
- Thermal decomposition
- Energetic materials
- Green propellant