Liquid–liquid equilibrium data including binodals and tie-line compositions have been measured for aqueous ternary biphasic system containing polyethylene glycol dimethyl ether 2000 (PEGDME₂₀₀₀) and sodium nitrite at three temperatures (298.15–318.15) K and atmospheric pressure (≈ 85 kPa). The salting-out of the polymer by the salt was studied at different temperatures. Furthermore, the ΔG_c, ΔH_c, and ΔS_c of the cloud points were computed at working temperatures from which it was found that the entropy is the driving force for phase separation. For representing the experimental binodal data two empirical equations with the temperature dependency were used. The Setschenow equation was utilized for correlating the measured tie-lines. Different versions of nonrandom two-liquid models were also selected in generating the obtained tie-lines. The plait point, and the characteristics of tie-lines (slope and the length) have been determined at working temperatures. The partitioning behavior of the iodine molecule in the above system was also studied.

中文翻译：

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包含聚乙二醇二甲醚2000和亚硝酸钠（298.15、308.15和318.15）K的水两相系统的热力学研究

在三个温度（298.15–318.15）K和大气压（≈85 kPa）下，对包含聚乙二醇二甲醚2000（PEGDME ₂₀₀₀）和亚硝酸钠的三元水溶液双相体系的液-液平衡数据进行了测量。。在不同温度下研究了盐对聚合物的盐析作用。此外，ΔG _c，ΔH _c和ΔS _c在工作温度下计算浊点的数量，从中发现熵是相分离的驱动力。为了表示实验二项式数据，使用了两个与温度相关的经验方程。Setschenow方程用于关联测得的联系线。在生成获得的联系线时，还选择了不同版本的非随机两液模型。在工作温度下已经确定了褶点和连接线的特性（斜率和长度）。还研究了碘分子在上述系统中的分配行为。