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利用温度快速跃升傅立叶变换红外原位分析技术对3-硝基-1,2,4-三唑-5-酮铅盐的快速热分解反应动力学进行了研究。借助快速升温过程中Pt金属丝的控制电压变化曲线得到剧烈放热峰的诱导出现时间tx,利用tx值计算得到了快速热分解过程的动力学参数。在0.1MPa氩气气氛,230￣270℃实验温度范围内,3-硝基-1,2,4-三唑-5-酮铅金属盐的活化能Ea=94.0kJ·mol-1,lnA=20.5。同时得到了该化合物快速热分解过程的近似吉布斯自由能变,熵变和焓变。该方法借助温度快速跃升技术,在模拟材料实际使用情况下计算得到其动力学参数,可用于含能材料燃烧模型的建立。
The rapid thermal decomposition kinetics of 3-nitro-1,2,4-triazol-5-one lead salt was investigated by rapid temperature-gradient Fourier transform infrared in situ analysis. The induction time tx of the exothermic peak was obtained by the control voltage curve of Pt wire during the rapid heating process. The kinetic parameters of the rapid thermal decomposition process were calculated by using the tx value. In the 0.1MPa argon atmosphere, the activation energy of 3-nitro-1,2,4-triazol-5-one lead metal is Ea = 94.0kJ · mol-1, lnA = 20.5. At the same time, Gibbs free energy, entropy change and enthalpy change were obtained for the rapid thermal decomposition of the compound. The method is based on rapid temperature jump technique to calculate its kinetic parameters under the actual use of simulated materials, and can be used to establish the combustion model of energetic materials.