Evaluation of thermal hazards and thermo-kinetic parameters of 3-amino-4-amidoximinofurazan by ARC and TG

Specific heat capacity of AAOF was studied from −15 to 70 °C. The equation describing the relationship can be written as Cp = 0.8483 + 0.00384 × T, −15.0 °C ≤ T ≤ 70 °C. Thermogravimetric thermal analysis and accelerating rate calorimetry (ARC) were performed to understand thermal characteristics and kinetics of energetic 3-amino-4-amidoximinofurazan (AAOF). Thermal decomposition occurred at 217.08, 228.91, 239.24, 255.78 °C at different heating rates (1.0, 2.0, 4.0 and 8.0 °C min⁻¹). ARC tests showed that the self-decomposition reaction of AAOF started at 197.4 °C and lasted for 86 min with the maximum temperature rise rate (152.33 °C min⁻¹) and the pressure rise rate (10,881 kPa min⁻¹). By applying ARC test data in 16 kinetic models in formula, the most possible mechanism functions, apparent activation energy (E_a) and pre-exponential factor (A) for the decomposition of AAOF were (1 - α) ², 226.19 kJ mol⁻¹ and 4.59 × 10²⁰ s⁻¹. In addition, the SADT of AAOF in 25 kg package is 205.37 °C based on ARC data.