Abstract 1-Ethyl-2, 3-dimethylimidazolium nitrate [C2mmim][NO3] is a typical solvent for industrial applications. Under inappropriate temperatures, [C2mmim][NO3] may present a flammability hazard due to thermal decomposition. This study investigated the thermal stability and flammability of [C2mmim][NO3] via simultaneous thermogravimetric analyzer, homemade combustion test device (CTD) with high speed camera, and thermogravimetry coupled with Fourier transform infrared spectroscopy (TG-FTIR). The thermal decomposition of [C2mmim][NO3] was divided into two parts based upon the dynamic experiments, and the maximum operating temperature was determined to comprehensively estimate the thermal stability of [C2mmim][NO3]. CTD experiments indicated that [C2mmim][NO3] could produce intense combustion when heated. Further TG-FTIR experiments confirmed that [C2mmim][NO3] decomposed to produce a large number of flammable gases, such as ethylene, which might be the reason that [C2mmim][NO3] has prominent flammability.

中文翻译：

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1-乙基-2, 3-二甲基咪唑硝酸盐的热稳定性和可燃性评估

摘要 1-乙基-2, 3-二甲基咪唑硝酸盐[C2mmim][NO3]是一种典型的工业应用溶剂。在不适当的温度下，[C2mmim][NO3] 可能会因热分解而存在易燃危险。本研究通过同步热重分析仪、带高速相机的自制燃烧试验装置 (CTD) 以及结合傅里叶变换红外光谱 (TG-FTIR) 的热重分析法研究了 [C2mmim][NO3] 的热稳定性和可燃性。[C2mmim][NO3]的热分解基于动态实验分为两部分，并确定了最高工作温度，以综合评估[C2mmim][NO3]的热稳定性。CTD实验表明[C2mmim][NO3]在加热时会产生强烈的燃烧。