Thermodynamics properties of binary mixtures of aqueous solutions of glycols at several temperatures and atmospheric pressure

Hoga, Heloisa Emi; Tôrres, Ricardo Belchior; Volpe, Pedro L. O.

doi:10.1016/j.jct.2018.02.022

Cited by 40 publications

(20 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this regard, it would be helpful if one could predict the physicochemical properties of polydisperse PEGs based on the analysis of their exact composition. It should be noted that even the low average molar mass PEG 200 covers oligomers from mono- to nonaethylene glycol with tetra- and pentaethylene glycol being the most prominent components. , A perusal of the literature reveals that there are numerous reports on density and viscosity for the neat lowest oligomers diethylene glycol, ,,− ,− trietheylene glycol, ,− ,,,,− ,− ,− ,− and tetraethylene glycol, ,,…”

Section: Introductionmentioning

confidence: 99%

Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers

Hoffmann

Horowitz

Gutmann³

et al. 2021

J. Chem. Eng. Data

View full text Add to dashboard Cite

Polyethylene glycol (PEG) is gaining interest as an alternative green solvent in chemical synthesis and processing. This report presents density and viscosity data from 293.15 K to 358.15 K as well as self-diffusion coefficient data from 298.15 K to 358.15 K for oligomers of PEG from di-to nonaethylene glycol. The results were obtained by extrapolation from measurement series where water, the most common impurity in PEGs, was intentionally added in several increments. The obtained results are carefully compared to literature data, which are widely available only for density and viscosity, and only for the lower oligomers. Densities are found to be linearly dependent on temperatures for all studied oligomers. The temperature dependence of viscosity and self-diffusion coefficients show only slight deviations from the Arrhenius equation over the investigated temperature range. The activation energies obtained from the viscosity data agree well with the activation energies from the self-diffusion coefficient data and appear to be linearly dependent with respect to the number of ethylene oxide repeat units in the PEG oligomer. This linearity combined with the observation that the pre-exponential factor appears to be the same for all studied oligomers may serve as a tool to estimate viscosities and self-diffusion coefficients for higher oligomers within the investigated temperature range. The densities of the oligomers all fall within a rather narrow range without a clear trend in homologous series.

show abstract

Section: Introductionmentioning

confidence: 99%

Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers

Hoffmann

Horowitz

Gutmann³

et al. 2021

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…We estimated the shockwave velocities to 1.4 km s −1 for water and 1.6 km s −1 for PEG. These results are in good agreement with the values reported in the literature, i.e.,1483 m s −1 for water [73] and 1615 m s −1 for PEG [74] .…”

Section: Resultsmentioning

confidence: 97%

Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination

Senegačnik

Kunimoto

Yamaguchi

et al. 2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

show abstract

“…In a study of the thermodynamic properties of aqueous solutions of poly(ethyleneglycols) (PEGs), their excess molar volumes were determined at different temperatures. 33 The data points were fitted with a Myers–Scott-type equation. 38 We obtained very good fittings ( r 2 > 0.99) employing eq 1 , which yielded the nonideal areas listed in Table 2 , entries 24–32.…”

Section: Resultsmentioning

confidence: 99%

“…After thorough measurements, the authors answered these questions in a qualitative way, by showing that the excess molar volumes of the aqueous mixtures were all negative, and increased in absolute values in the order ethylene glycol (EG) < diethyleneglycol (DEG) < triethyleneglycol (TEG) < PEG200 < PEG400 < PEG600. The nature of the water–PEG interactions was rather vaguely “ascribed to the predominance of structural effects and at high capacity that the unlike molecules present in the mixtures have to form intermolecular interactions by hydrogen bond.” 33 …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Use of Nonideality Parameters for the Analysis of the Thermodynamic Properties of Binary Mixtures

et al. 2021

View full text Add to dashboard Cite

Two parameters are introduced, a nonideality index (NII) and a nonideality area (NIA), for the analysis of the variations of thermodynamic properties of binary mixtures. Their calculation is based, for the NII, on experimental plots of the variation of a given property (density, refractive index, viscosity, etc.), and for the NIA, on experimental plots of its excess value (excess enthalpies, molar volumes, viscosities, refractive indices, isentropic compressibilities, etc.) with the mixture composition. Both nonideality parameters are therefore not based on any theoretical model or on its derived parameters, being applicable with any fitting equation. The NII or NIA values for a thermodynamic property of a series of related binary mixtures reveal interesting trends, which are not evident in most analyses of such systems. Besides their predictive value, these trends provide information on the relevance of solvent characteristics of the binary mixture, thus supporting new insights or interpretations of the experimental data.

show abstract

Thermodynamics properties of binary mixtures of aqueous solutions of glycols at several temperatures and atmospheric pressure

Cited by 40 publications

References 35 publications

Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers

Densities, Viscosities, and Self-Diffusion Coefficients of Ethylene Glycol Oligomers

Dynamics of laser-induced cavitation bubble during expansion over sharp-edge geometry submerged in liquid – an inside view by diffuse illumination

Use of Nonideality Parameters for the Analysis of the Thermodynamic Properties of Binary Mixtures

Contact Info

Product

Resources

About