Influence of Lead and Copper Salt Catalysts on the Thermal Decomposition and Cook-off Responses of DNTF

To improve its thermal safety, the effects of lead and copper salt catalysts, including CuSa, PbSa, β-Cu, Cu(PA)2, and CuO, on thermal decomposition and cook-off responses of DNTF were studied through PDSC and small scale cook-off experiments. Experiment results show that the thermal decomposition and cook-off reaction level can be adjusted by different analysts. To be specific, the organic copper salts, i. e., CuSa, β-Cu and Cu(PA)2, increase the rate of thermal decomposition of DNTF while reduce the decomposition temperature of DNTF. PbSa increases the decomposition temperature of DNTF by 3.1℃ and promotes its second decomposition; CuO has no effect on the thermal decomposition of DNTF. CuSa decreases the response temperature of cook-off test at heating rate of 1℃•min-1 for unrestrained DNTF from 236.6℃ to 182.3℃ while for high constraint by 2.4℃, and changes the reaction levels of both unrestrained and high constrained from explosion to burning. This implies that the cook-off responses of DNTF-based explosive could be decreased by organic copper salts, such as CuSa. © 2020, Editorial Board of Chinese Journal of Energetic Materials. All right reserved.