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用压力差热分析 (PDTA)研究了高氯酸铵 (AP)在高压下热分解动力学。结果表明 ,压力使 AP的 DTA曲线上高温分解峰移向高温 ,而使低温分解峰移向低温。压力提高高温分解的表观活化能 ,但却没有改变低温分解的动力学参数。还用分解机理和控制速度步骤解释了这些结果。
The thermal decomposition kinetics of ammonium perchlorate (AP) under high pressure was studied by differential thermal analysis (PDTA). The results show that the pressure moves the high temperature decomposition peak on the DTA curve of AP to a high temperature, and the low temperature decomposition peak shifts to a low temperature. Pressure increases the apparent activation energy of pyrolysis but does not change the kinetic parameters of pyrolysis. These results are also explained by the decomposition mechanism and the control speed step.