Thermal behavior of 3,4,5-triamino-1,2,4-triazole nitrate

The thermal decomposition behaviors of 3,4,5-triamino-1,2,4-triazole nitrate were studied using a C-500 type Calvet Micro-calorimeter at four different heating rates. Its apparent activation energy and pre-exponential factor of exothermic decomposition reaction are 137.16 kJ mol−1 and 1010.03 s−1. The critical temperature of thermal explosion is 441.37 K. The entropy of activation (ΔS≠), enthalpy of activation (ΔH≠), and free energy of activation (ΔG≠) of the decomposition reaction are −65.65 J mol−1 K−1, 132.97 kJ mol−1 and 166.35 kJ mol−1, respectively. The self-accelerating decomposition temperature (TSADT) is 429.56 K. The specific heat capacity was determined with a Micro-DSC method and a theoretical calculation method. Specific heat capacity (J g−1 K−1) equation is Cp = 0.356 + 2.957 × 10−3T (283.1 K < T < 353.2 K). The adiabatic time-to-explosion is calculated to be a certain value between 702.22 s and 712.22 s. The critical temperature of Hot-Spot initiation is 600.325 °C, and the characteristic drop height of impact sensitivity (H50) is 27 cm.