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  • 1 School of Chemistry and Materials Science, Shaanxi Normal University, 710062, Xi'an, Shaanxi, People's Republic of China
  • 2 Propellant and Explosive Combustion Key Lab of Science and Technology for National Defence, Xi'an Modern Chemistry Research Institute, 710065, Xi'an, Shaanxi, People's Republic of China
  • 3 School of Chemical Engineering and Environment, Beijing Institute of Technology, 100081, Beijing, People's Republic of China
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Abstract

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−1 and 1018.04s−1, respectively. The critical temperature of thermal explosion is 431.71 K. The entropy of activation (ΔS), enthalpy of activation (ΔH), and free energy of activation (ΔG) are 97.19 J mol−1K−1, 161.90 kJ mol−1, and 118.98 kJ mol−1, respectively. The self-accelerating decomposition temperature (TSADT) 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 g−1K−1) equation is Cp = 0.252 + 3.131 × 10−3T (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−1 K−1 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.

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