CAJ | 학술논문

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0.1 MPa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=94.0 kJ·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.
이용온도쾌속약승부립협변환홍외원위분석기술대3-초기-1,2,4-삼서-5-동연염적쾌속열분해반응동역학진행료연구.차조쾌속승온과정중Pt금속사적공제전압변화곡선득도극렬방열봉적유도출현시간tx,이용tx치계산득도료쾌속열분해과정적동역학삼수.재0.1 MPa아기기분,230～270℃실험온도범위내,3-초기-1,2,4-삼서-5-동연금속염적활화능Ea=94.0 kJ·mol-1,lnA=20.5.동시득도료해화합물쾌속열분해과정적근사길포사자유능변,적변화함변.해방법차조온도쾌속약승기술,재모의재료실제사용정황하계산득도기동역학삼수,가용우함능재료연소모형적건립.
Flash pyrolysis of a thin film of lead salt of 3-nitro-1,2,4-triazol-5-one was studied by T-jump/FTIR spectroscopy. The kinetics of the exothermic decomposition reaction was determined by the time-to-exotherm (tx)value derived from the control voltage traces of the Pt filament. The global Arrhenius activation energy Ea was 94.0 kJ· mol-1 and lnA was 20.5 for the flash pyrolysis of this compound at 500～540 K under 0.1 MPa Ar atmosphere. The corresponding Gibbs energy, entropy and enthalpy of the hypothetical activated process of exothermic decomposition reaction for the flash pyrolysis were determined approximately. The values determined herein could be used in evaluation of the thermal stability under rapid heating conditions and could be incorporated into steady combustion modelling.