Abstract Melting is a basic physicochemical process, used in examination of explosive mixtures elaborated by casting. In this paper, the melting process of TNT–DINA two-component mixture was analysed. Phase transformations of the system were investigated by means of differential scanning calorimetry. Several endothermic transformations were observed, with one being associated with the melting process of TNT–DINA eutectic mixture. A phase diagram was developed, which served to determine the composition of TNT–DINA eutectic mixture (DINA mole fraction of 0.69) as well as a melting point value (312.6 K). At high TNT contents, resultant low-temperature endothermic transformations may be associated with the solid-solid transformations. Kinetic parameters of decomposition reaction of TNT–DINA eutectic mixture were determined, which amounted to aEa = 157 ± 4 kJ mol−1, logA = 14.81 (for the degree of conversion of 0.03).

中文翻译：

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TNT-DINA 系统的固液平衡和热化学性质

摘要 熔化是一种基本的物理化学过程，用于检测铸造制成的爆炸性混合物。在本文中，分析了 TNT-DINA 双组分混合物的熔化过程。通过差示扫描量热法研究系统的相变。观察到了几种吸热转变，其中一种与 TNT-DINA 共晶混合物的熔化过程有关。开发了相图，用于确定 TNT-DINA 共晶混合物的组成（DINA 摩尔分数为 0.69）以及熔点值（312.6 K）。在高 TNT 含量下，由此产生的低温吸热转变可能与固-固转变有关。测定了 TNT-DINA 共晶混合物分解反应的动力学参数，