摘要
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。
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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2006年第10期1819-1822,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20471008)
北京理工大学基础研究基金资助项目(No.BIT-UBF-200502B4221)
