Thermokinetic behavior and heat-resistance stabilities of energetic triazole nitrates

Thermal behavior and non-isothermal decomposition kinetics of 4-amino-1, 2, 4-triazolium nitrate (1a) and 1-amino-1, 2, 3-triazolium nitrate (1b) were addressed by using TG-DTG method at different heating rates. The result shows that for 1a the ring-open reaction and subsquent decomposition reaction occur at highter temperature without obvious time interval, while for 1b these two kinds of reactions occur step by step during different temperature range. The kinetic equations for the decomposition of 1a and 1b were obtained by combining model-free method and model-fitting method. A new method that combining the evaluation way for the fundamental stability test with the evaluation way for the self-accelerating decomposition temperature to realize the evaluation for the heat-resistance of stabilities of energetic triazole nitrates was proposed, which got rid of the defects of former evaluation way for the self-accelerating decomposition temperature such as high cost, high danger, long cycle and so on. The result show that the heat-resistance ability has a close relationship with the symmetry of triazole ring. The better symmetry the triazole ring has, the stronger heat-resistance ability the energetic triazole nitrate has.