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用DSC和微热量仪研究了N-脒基脲二硝酰胺(GUDN)的放热分解反应动力学行为和比热容,计算得到程序升温下GUDN主放热分解反应的动力学参数(活化能Ea和指前因子A)、自加速分解温度(TSADT)、绝热条件下达到最大分解反应速率的时间(tTMRad)和至爆时间(tTIad).结果表明,在非等温DSC条件下,GUDN的热分解过程可用经验级数自催化动力学方程dα/dt=1018.49exp(-195500/RT)(1-α)0.81+1018.00exp(-177000/RT)α1.29(1-α)0.71描述.热分解转热爆炸的临界温升速率为0.1236K·h-1.所得的TSADT、tTMRad和tTIad值分别为473.95K、2.24s和3.51s.
The kinetic behavior and specific heat capacity of the exothermal decomposition of N-guanylurea dinitramide (GUDN) were investigated by DSC and microcalorimetry. The kinetic parameters (activation energy Ea and Pre-exponential factor A), self-accelerating decomposition temperature (TSADT), time to maximum decomposition reaction rate (tTMRad) and time to detonation (tTIad) under adiabatic condition.The results show that under non-isothermal DSC conditions, the thermal decomposition process of GUDN The empirical series autocatalytic kinetics can be described by the autocatalytic kinetic equation dα / dt = 1018.49exp (-195500 / RT) (1-α) 0.81 + 1018.00exp (-177000 / RT) α1.29 (1-α) The critical temperature rise rate of thermal explosion was 0.1236K · h-1. The TSADT, tTMRad and tTIad values obtained were 473.95K, 2.24s and 3.51s respectively.