新型高能量密度材料DNTF的热分解特性

通过DSC、TG研究了DNTF及DNTF与催化剂体系的热分解，分析了不同压力条件下DNTF的分解特性及分解规律。结果表明，在压力升高时，DNTF的熔融吸热峰温几乎不变，但其主要放热分解峰温在2MPa以后向高温方向移动，分解反应变得较为剧烈，与常压相比，分解放热明显增加，且随着压力增加，主分解峰后的二次分解渐渐明显。在压力作用下，分解气相产物加强了对凝聚相产物的催化作用，出现了二次分解。计算了分解过程的动力学参数，DNTF在常压与2MPa压力下分解动力学参数变化很大，常压下Ea=58．8kJ／mol，1nA=1．08s^-1；2MPa下Ea=205．1kJ／mol，1nA=33．64s^-1；说明高压下的分解规律发生了变化。讨论了压力及催化剂对DNTF热分解过程的影响。

Thermal Decomposition Characteristics of a Novel High Energy Density Material DNTF

The thermal decomposition of 3,4dinitrofurazanofuroxan(DNTF) and its interreaction with catalyst were investigated by using DSC and TG.The decomposition characteristics and regulation of DNTF under different pressure conditions were analyzed.The results showed that when the pressure increase,the endothermic fusion peak temperature of DNTF is almost constant,but the major exothermic decomposition peak temperature at 2MPa shifts to higher temperature and the decomposition become more violent.Compared to the atmospheric,the decomposition heat gain obviously and with increasing of the pressure the secondary decomposition peak after the main decomposition peak is gradually obvious.Under the pressure function,the decomposition gasouss products enhance the catalytic effect to product in coacervate phase,appearing the secondary decomposition.The kinetic parameters of DNTF decomposition were obained,and the values of E_a and lnA are 58.8kJ/mol and 1.08s~(-1) for ambient pressure,and 205.1kJ/mol and 33.64s~(-1) for 2MPa respectively.These results show that the significant changes in decomposition process occur under high pressure.The effects of pressure and catalyst on the thermal decomposition process of DNTF is obtained.