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

Abstract

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 10 10.03 s −1. The critical temperature of thermal explosion is 441.37 K. The entropy of activation (Δ S ≠ ), enthalpy of activation (Δ H ≠ ), and free energy of activation (Δ G ≠ ) 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 ( T SADT) 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 C p = 0.356 + 2.957 × 10 −3 T (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 ( H 50) is 27 cm.