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基于草酸偏二甲肼在核燃料后处理Purex流程污溶剂的洗涤及在双子表面活性剂合成中的应用,采用TG/DTG、DSC及热红联用技术对草酸偏二甲肼的热分解性能进行了研究。热分析结果表明,草酸偏二甲肼热分解主要发生在180.4~217.6℃之间,峰值温度约为199.2℃,分解过程为吸热反应。利用Kissinger法研究了草酸偏二甲肼非等温动力学方程式为ln(β/Tp2)=–7 564.21×(1/Tp)+6.132 5,计算并得出其热分解活化能E=62.89 kJ/mol,指前因子ln A=15.06。通过热重–红外联用分析其分解机理,推测出草酸偏二甲肼热分解产物主要为CO2、H2O及NH3等。
The thermal decomposition of UDMH was carried out by TG / DTG, DSC and thermal red combination technology, based on the washing of UF-UDM in the fouling solvent of the post-treatment Purex process of nuclear fuel and its application in gemini surfactant synthesis Study. The results of thermal analysis showed that the thermal decomposition of UDMH occurred mainly between 180.4-217.6 ℃, and the peak temperature was about 199.2 ℃. The decomposition process was endothermic. The non-isothermal kinetic equation of oxalic acid (UDMH) was studied by Kissinger method. The thermal decomposition activation energy E = 62.89 kJ / L was calculated and calculated as ln (β / Tp2) = - 7 564.21 × (1 / Tp) mol, pre-exponential factor ln A = 15.06. The mechanism of decomposition was analyzed by thermogravimetry-infrared spectroscopy, and it was inferred that the thermal decomposition products of UDMH mainly consisted of CO2, H2O and NH3.