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 degrees C. The equation describing the relationship can be written as Cp = 0.8483 + 0.00384 x T, -15.0 degrees C <= T <= 70 degrees 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 degrees C at different heating rates (1.0, 2.0, 4.0 and 8.0 degrees C min(-1)). ARC tests showed that the self-decomposition reaction of AAOF started at 197.4 degrees C and lasted for 86 min with the maximum temperature rise rate (152.33 degrees 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 - alpha)(2), 226.19 kJ mol(-1) and 4.59 x 10(20) s(-1). In addition, the SADT of AAOF in 25 kg package is 205.37 degrees C based on ARC data.