Dihydroxylammonium 5,5'-Bistetrazole-1,1'-diolate (TKX-50):Physico-chemical Properties and Mechanism of Thermal Decomposition and Combustion

摘要

The physico-chemical characterization (thermal decomposition under non-and isothermal conditions, enthalpy of formation, burning behavior and flame structure) of a new explosive dihydroxylammonium 5,5'-bistetrazole-l,l'-diolate is detailed.The combustion of TKX-50 has been shown to obey mechanism with the leading reaction in the condensed phase.The rates of TKX-50 decomposition in both solid and liquid phases proved to be slightly higher than the corresponding rates of decomposition of RDX.Decomposition of TKX-50 is determined by decomposition of free hydroxylamine formed in the reaction of dissociation of the salt.An intermediate decomposition product is ammonium salt of 5,5'-bis(2-hydroxytewazole), which further decomposes in the second stage at elevated temperatures.The enthalpy of formation of TKX-50 has been measured with the help of bomb calorimetry, however the resulting value is quite different from the enthalpy reported earlier.