Non-isothermal decomposition Kinetics of 1-amino-1,2,3-triazolium nitrate

The thermal decomposition kinetics of 1-amino-1,2,3-triazolium nitrate (ATZ-NO₃) was investigated by non-isothermal TG-DTG at various heating rates (2, 5, 10, 15, and 20 °Ci·min^-1). The results showed that the thermal decomposition of ATZ-NO₃ consists of two mass-loss stages. The first mass-loss stage corresponds to the loss of nitrate anion and the substituent group, while the second stage corresponds to the splitting of the triazole ring. The kinetic triplets of the two stages were described by a three-step method. Firstly, the Kissinger and Ozawa methods were used to calculate the apparent activation energies (E) and pre-exponential factors (A) of the two decomposition stages. Secondly, two calculation methods (the Šatava-Šesták and Achar methods) were used to obtain several probable decomposition mechanism functions. Thirdly, three assessment methods (the Šatava, double-extrapolation, and the Popescu methods) were used to confirm the most probable decomposition mechanism functions. The reaction models for both stages are random-into-nuclear and random-growth mechanisms, with n = 3/2 for the first stage and n = 1/3, m = 3 for the second stage. The kinetic equations for the two decomposition stages of ATZ-NO₃ may be expressed as Mathematical expressions for the kinetic compensation effect were derived.