Abstract In this study, second and third virial coefficients and the Joule-Thomson inversion curves for the binary mixtures of diethylamine (DEA) with 1-pentanol up to 1-nonanol were calculated regarding the Peng-Robinson-Stryjek-Vera (PRSV) equation. Experimental densities were used to calculate the adjustable parameters of the PRSV equation. The estimation of the thermodynamic factor for the binary systems from the COSMO-RS model shows that the considered mixtures exhibit a negative deviation from Raoult's Law. Besides, the diffusion coefficients for the binary mixtures in the whole composition range were determined regarding experimental viscosities. The results were analyzed to gain information about the liquid structure in the binary mixtures. It has been shown that intermolecular forces between DEA and 1-alkanol, which changes with the alcohol chain length, have a significant impact on the above-mentioned parameters. The investigation has shown that increasing the alcohol chain length reinforces the strength of intermolecular interactions.

中文翻译：

---

含有二乙胺和(C5-C9)1-烷醇的二元混合物的相互扩散、焦耳-汤姆逊反演曲线和维里系数的一些研究

摘要 在本研究中，根据 Peng-Robinson-Stryjek-Vera (PRSV) 方程计算了二乙胺 (DEA) 与 1-戊醇至 1-壬醇的二元混合物的第二和第三维里系数以及焦耳-汤姆逊反演曲线. 实验密度用于计算 PRSV 方程的可调参数。来自 COSMO-RS 模型的二元系统热力学因子的估计表明，所考虑的混合物表现出与拉乌尔定律的负偏差。此外，根据实验粘度确定了整个组成范围内二元混合物的扩散系数。分析结果以获得关于二元混合物中液体结构的信息。已经表明，DEA 和 1-烷醇之间的分子间作用力，随着醇链长度的变化，对上述参数有显着影响。研究表明，增加醇链长度会增强分子间相互作用的强度。