Thermal behavior of 1,2,3-triazole nitrate.

The thermal decomposition behaviors of 1,2,3-triazole nitrate were studied using a Calvet Microcalorimeter at four different heating rates. Its apparent activation energy and pre-exponential factor of exothermic decomposition reaction are 133.77 kJ mol and 10 s, respectively. The critical temperature of thermal explosion is 374.97 K. The entropy of activation (Δ S), the enthalpy of activation (Δ H), and the free energy of activation (Δ G) of the decomposition reaction are 23.88 J mol K, 130.62 kJ mol, and 121.55 kJ mol, respectively. The self-accelerating decomposition temperature ( T) is 368.65 K. The specific heat capacity was determined by a Micro-DSC method and a theoretical calculation method. Specific heat capacity equation is $$ C_{\text{p}} \left( {{\text{J mol}}^{ - 1} {\text{ K}}^{ - 1} } \right) = - 42.6218 + 0.6807T $$ (283.1 K < T < 353.2 K). The adiabatic time-to-explosion is calculated to be a certain value between 98.82 and 100.00 s. The critical temperature of hot-spot initiation is 637.14 K, and the characteristic drop height of impact sensitivity ( H) is 9.16 cm. [ABSTRACT FROM AUTHOR]