Non‐isothermal Decomposition Kinetics, Specific Heat Capacity and Adiabatic Time‐to‐explosion of a High Energy Material: 4,6‐Bis(5‐amino‐3‐nitro‐1,2,4‐triazol‐1‐yl)‐5‐nitropyrimidine

The thermal behavior of 4,6‐bis‐(5‐amino‐3‐nitro‐1,2,4‐triazol‐1‐yl)‐5‐nitropyrimidine (BANTNP) was studied under a non‐isothermal condition by DSC, PDSC and TG/DTG methods. The kinetic parameters ( E a and A ) of the exothermic decomposition reaction are 304.52 kJ·mol −1 and 10 24.47 s −1 at 0.1 MPa, 272.52 kJ·mol −1 and 10 21.76 s −1 at 5.0 MPa, respectively. The kinetic equation at 0.1 MPa can be expressed as:d α /d T =10 25.3 (1− α ) 3/4 exp(−3.8044×10 4 / T )/ β The critical temperature of thermal explosion is 588.28 K. The specific heat capacity of BANTNP was determined with a Micro‐DSC method, and the standard molar specific heat capacity is 397.54 J·mol −1 ·K −1 at 298.15 K. The adiabatic time‐to‐explosion of BANTNP was calculated to be 11.75 s.