二甲基乙酰胺溶剂热危险性研究

纺织学报 ›› 2013, Vol. 34 ›› Issue (3): 98-101.

二甲基乙酰胺溶剂热危险性研究

陈晨郭耸万伟彭敏君余罕元陈网桦

收稿日期:2012-03-31 修回日期:2012-06-05 出版日期:2013-03-15 发布日期:2013-03-07
通讯作者: 郭耸 E-mail:varshelf@gmail.com
基金资助:
国家自然科学基金资助项目

Study on thermal hazard of dimethylacetamide(DMAc)

Received:2012-03-31 Revised:2012-06-05 Online:2013-03-15 Published:2013-03-07

摘要/Abstract

摘要： 为研究二甲基乙酰胺（DMAc）的热稳定性和热安全性，利用微量量热仪（C80）对DMAc的热分解行为进行试验研究，得到了DMAc的分解过程的特性曲线及相关实验数据。根据得到的实验数据求解出DMAc的活化能、指前因子和反应焓等化学反应动力学和热力学参数。利用动力学参数算出DMAc自加速分解温度（SADT），对其热危险性进行评估。结果表明：DMAc在空气气氛中发生自分解放热反应，反应热为32KJ/kg、活化能为178.1KJ/mol；根据Semenov模型推算得到自加速分解温度（SADT）为93.7℃。DMAc具有较大的热危险性，在使用存储过程中应防止温度超过其SADT而引发分解爆炸事故。

关键词: 二甲基乙酰胺, 热分解, 动力学参数, 自加速分解温度

Abstract: The thermal decomposition of DMAc was studied by C80 Calorimetry in order to investigate the thermal stability and themal safety of DMAc. The characteristic curves and experimental data of a decomposition were obtained. The kinetics parameters including the activation energy, preexponential factor and reaction enthalpy were calculated by the thermal kinetics analysis method.Meanwhile,based on these kinetic parameters,the self-accelerating decomposition temperature(SADT) was calculated and the thermal safety on DMAc was evaluated. The results showed that self-exothermic decomposition reaction occurred in the air atmosphere. The heat of reaction was 32KJ/Kg. The activation energy was 178.1KJ/mol. The SADT was calculated according to the Sememnov model, and its value was 93.7℃. DMAc has a larger thermal hazard. In the using and storage process,the temperature rising should be prevented, or else, the explosion accident of the DMAc will be initiated by self-exothermic decomposition reaction.

Key words: dimethylacetanide, thermal decomposition, kinetics parameters, self-accelerating decomposition temperature

中图分类号:

X932

陈晨郭耸万伟彭敏君余罕元陈网桦. 二甲基乙酰胺溶剂热危险性研究[J]. 纺织学报, 2013, 34(3): 98-101.

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