Vapor-liquid and liquid-liquid equilibria in the water plus poly(propylene glycol) system

被引：4

作者：

Pavlicek, Jan ^{[1
]}

Rotrekl, Jan ^{[1
]}

Bogdanic, Grozdana ^{[1
]}

Wichterle, Ivan ^{[1
]}

Izak, Pavel ^{[1
]}

机构：

[1] Czech Acad Sci, Inst Chem Proc Fundamentals, Rozvojova 135, Prague 16502 6, Czech Republic

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2021年 / 337卷

关键词：

Vapor-liquid equilibrium; Liquid-liquid equilibrium; Polymer-solvent system; Correlation; SEGMENTAL INTERACTION-MODEL; SODIUM DODECYL-SULFATE; EQUATION-OF-STATE; POLYPROPYLENE GLYCOL; SOLVENT ACTIVITIES; POLY(ETHYLENE GLYCOL); POLYMER-SOLUTIONS; THERMODYNAMIC PROPERTIES; POLYETHYLENE GLYCOL; PRESSURE OSMOMETRY;

D O I：

10.1016/j.molliq.2021.116336

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The aim of this study was to investigate phase equilibria in a water + poly(propylene glycol) [M-n = 425 g mol(-1)] system. Vapor-liquid equilibria (VLE) were determined ebulliometrically in the completely miscible region with higher water concentrations at isotherms 323.15, 333.15, 343.15, and 353.15 K. These data were correlated with the UNIQUAC free-volume (FV) model to be consistent with our previous studies. Liquid-liquid equilibrium (LLE) was determined using the cloud-point method at 320-350 K, and lower critical solution temperature was found at 320.2 K. LLE was correlated with the entropic FV-UNIQUAC segmental interaction model developed earlier, which is suited for correlation and calculation of LLE of polymer solutions. We estimated new binary segmental interaction parameters for interactions between propylene glycol and water segments. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：6

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