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

The thermal decomposition behavior of 3,4,5-triamino-1,2,4-triazole dinitramide was measured using a C-500 type Calvet microcalorimeter at four different temperatures under atmospheric pressure. The apparent activation energy and pre-exponential factor of the exothermic decomposition reaction are 165.57 kJ mol and 10s, respectively. The critical temperature of thermal explosion is 431.71 K. The entropy of activation (Δ S), enthalpy of activation (Δ H), and free energy of activation (Δ G) are 97.19 J molK, 161.90 kJ mol, and 118.98 kJ mol, respectively. The self-accelerating decomposition temperature ( T) is 422.28 K. The specific heat capacity of 3,4,5-triamino-1,2,4-triazole dinitramide was determined with a micro-DSC method and a theoretical calculation method. Specific heat capacity (J gK) equation is C = 0.252 + 3.131 × 10 T (283.1 K < T < 353.2 K). The molar heat capacity of 3,4,5-triamino-1,2,4-triazole dinitramide is 264.52 J mol K at 298.15 K. The adiabatic time-to-explosion of 3,4,5-triamino-1,2,4-triazole dinitramide is calculated to be a certain value between 123.36 and 128.56 s. [ABSTRACT FROM AUTHOR]