Abstract The thermal decomposition kinetics of an energetic oxidizer viz., potassium dinitramide (KDN) has been studied by non-isothermal thermogravimetry (TG) technique. The dependence of activation energy (Ea) on conversion (α) was evaluated using isoconversional method of Vyazovkin (VYZ). A strong dependence of Ea on α was observed, where the mean Ea value of 185.86 kJ/mol was obtained from VYZ. The classical Kissinger method has also been used to calculate the Ea for the decomposition of KDN. Isothermal conversion-time data was predicted from the kinetic parameters derived from the integral isoconversional method of Vyazovkin. The preexponential factor was calculated by a model-free estimate using the kinetic compensation effect. A mechanistic approach for the decomposition of KDN is proposed based on TG-MS studies, Raman spectroscopy and quantitative analysis of the decomposition products.

中文翻译：

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高能氧化剂非等温分解动力学的等转化分析：二硝胺钾（KDN）

摘要 用非等温热重（TG）技术研究了高能氧化剂二硝酰胺钾（KDN）的热分解动力学。使用 Vyazovkin (VYZ) 的等转化方法评估活化能 (Ea) 对转化率 (α) 的依赖性。观察到 Ea 对 α 的强烈依赖性，其中 185.86 kJ/mol 的平均 Ea 值是从 VYZ 获得的。经典的 Kissinger 方法也已用于计算 KDN 分解的 Ea。等温转化时间数据是根据 Vyazovkin 积分等转化方法得出的动力学参数预测的。使用动力学补偿效应通过无模型估计计算指前因子。基于TG-MS研究提出了一种分解KDN的机理方法，