Thermal behavior and thermal safety on 3,3-dinitroazetidinium salt of perchloric acid

3,3-Dinitroazetidinium (DNAZ) salt of perchloric acid (DNAZ center dot HClO(4)) was prepared, it was characterized by the elemental analysis, IR, NMR, and a X-ray diffractometer. The thermal behavior and decomposition reaction kinetics of DNAZ center dot HClO(4) were investigated under a non-isothermal condition by DSC and TG/DTG techniques. The results show that the thermal decomposition process of DNAZ center dot HClO(4) has two mass loss stages. The kinetic model function in differential form, the value of apparent activation energy (E (a)) and pre-exponential factor (A) of the exothermic decomposition reaction of DNAZ center dot HClO(4) are f(alpha) = (1 - alpha)(-1)/2, 156.47 kJ mol(-1), and 10(15.12) s(-1), respectively. The critical temperature of thermal explosion is 188.5 A degrees C. The values of Delta S (not equal), Delta H (not equal), and Delta G (not equal)of this reaction are 42.26 J mol(-1) K(-1), 154.44 kJ mol(-1), and 135.42 kJ mol(-1), respectively. The specific heat capacity of DNAZ center dot HClO(4) was determined with a continuous C (p) mode of microcalorimeter. Using the relationship between C (p) and T and the thermal decomposition parameters, the time of the thermal decomposition from initiation to thermal explosion (adiabatic time-to-explosion) was evaluated as 14.2 s.