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首页> 外文期刊>Fluid Phase Equilibria >Phase diagram and thermodynamic modeling of PEO+organic salts+H_2O and PPO+organic salts+H_2O aqueous two-phase systems
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Phase diagram and thermodynamic modeling of PEO+organic salts+H_2O and PPO+organic salts+H_2O aqueous two-phase systems

机译：PEO +有机盐+ H_2O和PPO +有机盐+ H_2O水两相系统的相图和热力学模型

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摘要

The phase diagrams of PEO1500. +. sodium tartrate. +. water, PPO400. +. sodium tartrate. +. water, PEO1500. +. sodium succinate. +. water, PPO400. +. sodium succinate. +. water, PEO1500. +. sodium citrate. +. water, PPO400. +. sodium citrate. +. water and PPO400. +. sodium acetate. +. water aqueous two-phase systems were determined at (283.15, 298.15, and 313.15). K. Both equilibrium phases composition were analyzed by conductimetry and refractive index. In this paper, the influences of polymer hydrophobicity, salt nature and temperature on the phase diagram were analyzed. The phase separation processes was endothermic and the hydrophobic increase make easier the phase splitting, while the electrolyte capacity to induce phase separation follow the order: citrate > tartrate > succinate. The consistency of the tie-line data was ascertained by applying the Othmer-Tobias correlation. The experimental data were correlated with the NRTL model for the activity coefficient, with estimation of new interaction energy parameters. The results, analyzed in terms of root mean square deviations between experimental and calculated compositions, were considered satisfactory.
机译：PEO1500的相图。 +。酒石酸钠。 +。水，PPO400。 +。酒石酸钠。 +。水，PEO1500。 +。琥珀酸钠。 +。水，PPO400。 +。琥珀酸钠。 +。水，PEO1500。 +。柠檬酸钠。 +。水，PPO400。 +。柠檬酸钠。 +。水和PPO400。 +。醋酸钠。 +。在（283.15、298.15和313.15）确定水水两相系统。 K.通过电导率和折射率分析两个平衡相的组成。本文分析了聚合物疏水性，盐性质和温度对相图的影响。相分离过程是吸热的，疏水性增加使相分离更容易，而引起相分离的电解质容量遵循以下顺序：柠檬酸盐>酒石酸盐>琥珀酸盐。通过应用Othmer-Tobias相关性确定联系线数据的一致性。将实验数据与NRTL模型的活度系数相关联，并估算新的相互作用能参数。根据实验组成和计算组成之间的均方根偏差分析的结果被认为是令人满意的。

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