Thermal Behaviors of 2-(Dinitromethylene)-1,3-diazacycloheptane (DNDH)

摘要

2-(Dinitromethylene)-1,3-diazacycloheptane (DNDH) was prepared by the reaction of 1,1-diamino-2,2-dinitroethylene (FOX-7) with 1,4-diaminoethane in NMP. Thermal decomposition behavior of DNDH was studied under the non-isothermal conditions with DSC method, and presents only one intensely exothermic decomposition process. The kinetic equation of the decomposition reaction is d/dT=1033.88×32/3exp(?3.353×105/RT)/β. The critical temperature of thermal explosion is 215.97°C. Specific heat capacity of DNDH was studied with micro-DSC method and theoretical calculation method, and the molar heat capacity is 215.40 J·mol?1·K?1 at 298.15 K. Adiabatic time-to-explosion was calculated to be 92.07 s. DNDH has same thermal stability to FOX-7.