Isobaric, isothermal theoretical investigation and examination of different prediction equations on some physicochemical properties in PEG liquid polymer system

[Display omitted] •Measuring densities, viscosities and refractive index of PEG+ethanol binary system.•Examination of the excess molar volume with PFP and ERAS models.•Deducing excess expansion and other thermodynamic parameters.•Correlation of viscosity and refractive index data with various predic...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 2014-01, Vol.68, p.205-215
Main Authors: Moosavi, Mehrdad, Omrani, Abdollah, Ali Rostami, Abbas, Motahari, Ahmad
Format: Article
Language:English
Subjects:
Activation energy
Correlation
Ethanol
Ethyl alcohol
Mathematical analysis
Mathematical models
Poly(ethylene glycol)
Prediction equations
Refractivity
Thermal expansion
Thermophysical properties
Viscosity
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Summary:[Display omitted] •Measuring densities, viscosities and refractive index of PEG+ethanol binary system.•Examination of the excess molar volume with PFP and ERAS models.•Deducing excess expansion and other thermodynamic parameters.•Correlation of viscosity and refractive index data with various prediction equations. Densities, viscosities and refractive indices of the {poly(ethylene glycol) 200+ethanol} binary liquid system were determined at three temperatures of (298.15, 303.15, and 308.15)K. From the experimental results, the excess molar volume was obtained and correlated with the Prigogine–Flory–Patterson (PFP) and Extended Real Associated Solution (ERAS) models. Several isobaric and isothermal properties consisting of the isobaric thermal expansion coefficient, excess molar isobaric expansion, excess molar isobaric heat capacity, isothermal coefficient of excess molar enthalpy, activation energy of flow, electron polarizibility, and Gibbs energy of activation were calculated from the experimental measurements. Moreover, the viscosity and refractive index values were correlated and predicted with different semi-empirical equations. To assess the validity of these proposed equations, comparisons were made between the experimental and predicted values.
ISSN:0021-9614
1096-3626
DOI:10.1016/j.jct.2013.09.006