Abstract The thermal decompositions of acetaldehyde-2,4-dinitrophenylhydrazone and propionaldehyde-2,4-dinitrophenylhydrazone were studied using differential scanning calorimetry technique, in non-isothermal and isothermal regime. In non-isothermal linear regime, both model-fitting and model-free models were used. In isothermal regime, at several constant temperatures lower than the melting points, no decomposition was identified after more than three hours of isothermal time. The experimental curves were used to obtain the useful physical and thermodynamic melting and decomposition parameters. The activation parameters were obtained using model-free and isoconversional methods. Subsequently, the kinetic model of exothermal decomposition was established by means of multivariate non-linear regression analysis. An autocatalytic decomposition mechanism was found, a common characteristic of compounds with one or more nitro groups in their molecule. The isothermal prediction based on the assigned kinetic model and kinetic parameters were developed. Using similar data for several related compounds, previously reported, a discussion on the structure-properties relationship is proposed.

中文翻译：

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新醛-2,4-二硝基苯腙的热分解：动力学研究和热危害预测

摘要 采用差示扫描量热法研究了乙醛-2,4-二硝基苯腙和丙醛-2,4-二硝基苯腙在非等温和等温条件下的热分解。在非等温线性状态下，使用模型拟合和无模型模型。在等温状态下，在低于熔点的几个恒定温度下，在超过三个小时的等温时间后没有发现分解。实验曲线用于获得有用的物理和热力学熔化和分解参数。使用无模型和等转换方法获得激活参数。随后，通过多元非线性回归分析建立了放热分解动力学模型。发现了自催化分解机制，这是分子中具有一个或多个硝基的化合物的共同特征。开发了基于指定动力学模型和动力学参数的等温预测。使用先前报道的几种相关化合物的类似数据，提议讨论结构-性质关系。