Vapour–liquid equilibrium of ternary aqueous polymer solutions containing polyethylene glycol and polyethylene glycol dimethyl ether at different temperatures

Evaluation of Water Activity in H2O–PEG400–PEG6000 Solutions between 318.15 and 348.15 K

“…Thus, the availability of thermodynamic properties of aqueous solutions of PEGs over a wide range of temperatures and concentrations should be of great interest . In this context and taking into account that the solvent activity can be evaluated from the experimental determination of the vapor pressure, this property has been measured in water–polymer binary systems, mainly in the temperature range 298.15–308.15 K. − However, data related to ternary systems formed by two polymers dissolved in water ,, are markedly scarce, information not having been found for temperatures higher than 308.15 K.…”

Vapor–Liquid Equilibria, Density, Speed of Sound, and Viscosity for the Poly(ethylene glycol) 400 + 1-Propanol and 1-Butanol Systems

“…Despite the needs for vapor–liquid equilibrium characteristics of polymer solutions in various polymer processing design industries, − experimental information on such systems is still limited . While there are many reports on the water activity or vapor pressure data for the PEG + H 2 O system at different temperatures and over a wide range of polymer molar masses, − relatively little information is available for vapor–liquid equilibrium data of PEG + alcohol systems. , In this work, using the improved isopiestic method solvent activity data for PEG 400 + 1-propanol and PEG 400 + 1-butanol systems were measured at T = 298.15 K.…”