Thermal Behaviors of 2‐(Dinitromethylene)‐1,3‐diazacycloheptane (DNDH) |
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Authors: | Lei Lü Kangzhen Xu Gang Wang Jinan Luo Jirong Song Bozhou Wang Fengqi Zhao |
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Affiliation: | 1. College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China;2. Department of Chemical Engineering, Northwest University, Xi'an, Shaanxi 710069, China;3. Xi'an Modern Chemistry Research Institute, Xi'an, Shaanxi 710065, China |
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Abstract: | 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 dα/dT=1033.88×3α2/3exp(−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. |
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Keywords: | 2‐(dinitromethylene)‐1,3‐diazacycloheptane (DNDH) 1,1‐diamino‐2,2‐dinitroethylene (FOX‐7) thermal behavior nitrogen heterocycles thermochemistry |
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