Abstract The solid-liquid equilibria (SLE) modeling of fatty acids binary systems is known as a challenging topic. Due to their complex phase diagrams and to their inherent nature to polymorphism, the modeling of the solid-liquid equilibria of the fatty acids blends requires a significant amount of data obtained with numerous techniques. The infrared thermography method (IRT) proves to be an interesting alternative by providing large quantities of phase transitions data, including the potential detection of the polymorphic ones. In this work, the applicability of this method for SLE modeling is assessed based on two criteria: i) the accuracy of empirical and theoretical models is assessed in comparison with IRT data; ii) the polymorphic transition temperatures detected via IRT are used as inputs in a model using polymorphic transition enthalpies as adjusting parameters. Polymorphic transitions data is compared to literature and to DSC measurements to evaluate the reliability of IRT for polymorphic transitions detection and of the estimated enthalpies consistency.

中文翻译：

---

红外热像法在有机二元系统固液平衡建模中的应用

摘要 脂肪酸二元系统的固液平衡 (SLE) 建模被认为是一个具有挑战性的课题。由于它们复杂的相图和它们固有的多态性，脂肪酸混合物的固液平衡建模需要通过多种技术获得大量数据。红外热像法 (IRT) 被证明是一种有趣的替代方法，可提供大量相变数据，包括多晶型的潜在检测。在这项工作中，基于两个标准评估了这种方法对 SLE 建模的适用性：i) 与 IRT 数据相比，评估了经验和理论模型的准确性；ii) 通过 IRT 检测到的多晶转变温度用作模型中的输入，使用多晶转变焓作为调整参数。将多晶型跃迁数据与文献和 DSC 测量值进行比较，以评估 IRT 对多晶型跃迁检测和估计焓一致性的可靠性。