聚氨酯发射药的非等温热分解反应动力学研究

Study on non-isothermal thermal decomposition reaction kinetics of polyurethane gun propellant

通过差示扫描量热法(DSC)研究以聚氨酯弹性体、黑索金、硝化纤维素以及太根等组成的聚氨酯发射药的热分解性能,将DSC数据结合Kissinger方程和Ozawa方程计算其活化能、指前因子和机理函数方程。聚氨酯发射药(含太根)活化能E和指前因子A约为140 kJ/mol和1.45×10^(14);聚氨酯发射药(不含太根)活化能E和指前因子A约为128 kJ/mol和9.73×10^(13)。聚氨酯发射药热爆炸临界温度T_b约为490 K,自加速分解温度约为475 K。

Study on the polyurethane propellant made up with polyurethane, RDX, NC and TEGDN, which was tested by the DSC. The activated energy, pre-exponential factor and conversion function mechanism were calculated through Kissinger and Ozawa equation. The activated energy and pre-exponential factor of polyurethane propellant which contains TEGDN were about 140 kJ/mol, 1.45 × 1014 respectively ,and the activated energy and pre-exponential factor of polyurethane propellant which no TEGDN were about 128 kJ/mol,9.73 × 1013 respectively. The critical temperature of thermal explosion was about 490 K and the self accelerating decomposition temperature was about 475 K.