Densities, Viscosities, and Refractive Indices of Poly(ethylene glycol) 300 + 1,2-Ethanediol, 1,2-Propanediol, 1,3-Propanediol, 1,3-Butanediol, or 1,4-Butanediol Binary Liquid Mixtures

Azarang, Nasim; Movagharnejad, Kamyar; Pirdashti, Mohsen; Ketabi, Mahnam

doi:10.1021/acs.jced.9b01189

Cited by 20 publications

(8 citation statements)

References 51 publications

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“…Pd-catalyzed reactions (the importance of these can be seen in the 2010 Nobel prize award for their discovery) have also been carried out in PEG under both homocatalytic and heterocatalytic conditions where Pd is immobilized onto a porous silica material. − PEGs have also been successfully used as components in deep eutectic solvents. − Despite all of these successes, there are only limited experimental and theoretical studies on the dynamics of neat PEG. − Experimental physicochemical properties of PEGs are needed to further this effort. In this respect, densities and viscosities have been repeatedly reported for several polydisperse PEGs usually as part of studies on binary mixtures involving polydisperse PEGs. − The polydisperse PEGs are composed of mixtures of PEG oligomers with approximately a Gaussian mole fraction distribution around the mean chain length. ,, It is likely that the exact mole fraction distribution may vary from vendor to vendor and possibly even from batch to batch. Unfortunately, a composition analysis of polydisperse PEGs is typically not included in the above cited studies.…”

Section: Introductionmentioning

confidence: 99%

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

Hoffmann

Horowitz

Gutmann³

et al. 2021

J. Chem. Eng. Data

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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.

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Section: Introductionmentioning

confidence: 99%

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

Hoffmann

Horowitz

Gutmann³

et al. 2021

J. Chem. Eng. Data

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“…Generally, excess property ( V E , κ S E , Δη) values reflect the strength of intermolecular forces between the components, which could be physical (dipole– dipole interaction and dispersion forces), chemical (specific), or geometric (structural) in nature. ,, Physical interactions are weak forces, whereas charge transfer and hydrogen bonding interactions are stronger and lead to more efficient packing in the system and volume contraction. Structural effects arise as a result of interstices within the components producing a compact structure. , These contributions have complex and even opposing effects on one another …”

Section: Resultsmentioning

confidence: 99%

Physicochemical Properties of Choline Chloride/Acetic Acid as a Deep Eutectic Solvent and Its Binary Solutions with DMSO at 298.15 to 353.15 K

Sheikh,

Khan,

Ahmed

2024

ACS Omega

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Deep eutectic solvents (DESs) are considered to play an important role in green chemistry and other technological fields as an alternative to organic solvents. The present study reports measurements of density (ρ), speed of sound (u), dynamic viscosity (η), and electrical conductivity (κ) and investigates physicochemical properties of choline chloride/acetic acid (ChCl/AcA DES) and its binary mixtures with dimethyl sulfoxide (DMSO) over the entire composition and temperature (298.15−353.15 K) range. The density data are well fitted by a second-degree polynomial equation in T. DES/DMSO mixtures exhibit negative excess molar volume and isentropic compressibility deviation with a minimum in respective curves at x 1 ≈ 0.15 (x 1 is the mole fraction of DES in the mixture), which became deeper with increasing temperature. The ChCl/AcA DES and DMSO curves for excess partial molar volume cross each other at x 1 ≈ 0.15, showing that the packing effect is dominant over specific interactions. A similar behavior is observed for excess molar viscosity, showing the minima at x 1 ≈ 0.62, and substantiates volumetric results. The temperature dependence of viscosity and conductivity is well described by the Vogel−Fulcher−Tammann (VFT) equation.

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“…Besides, as the temperature increases, the viscosity deviation Δη of all mixture systems increases. The negative value of Δη can be explained as the interaction between [MOEMIM][SCN] and GBL or PC molecules. , The following theoretical calculations will further confirm this result.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamics Properties and Internal Interactions of Ether-Group Functionalized Thiocyanate Ionic Liquid 1-(2-Methoxyethyl)-3-Methylimidazolium Thiocyanate and Its Mixtures with 1,4-Butyrolactone or Propylene Carbonate

Guan

Zhang

et al. 2022

J. Chem. Eng. Data

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In this paper, thermodynamic properties such as density, conductivity, and viscosity of an ether-based-functionalized ionic liquid (IL) 1-(2methoxyethyl)-3-methylimidazole thiocyanate [MOEMIM][SCN] was measured at temperatures from (288.15 to 343.15) K and at atmospheric pressure (101 KPa). Then, the mixture systems blends of [MOEMIM][SCN] + 1,4-butyrolactone (GBL) or propylene carbonate (PC) were also prepared and measured over the whole composition range at the same temperature and pressure conditions. The Vogel−Fulcher−Tamman (VFT) equation was employed to describe the temperature dependence of transport properties (viscosity and conductivity). The Casteel− Amis four-parameter (C−A) equation was used to explain the mole fraction dependence of ILs on the electrical conductivity. From the experimental density and viscosity, the excess molar volume (V E ) and viscosity deviation (Δη) were obtained, and fitting results of the Redlich−Kister (R−K) polynomial equation showed that the changes of the excess properties were reasonable for the mixtures. Combined with the COSMO−RS model based on DFT calculation, the intermolecular interaction situations of the mixture systems were evaluated. Further, the σ-profile can provide the computational aspect of specific interactions between molecules or between solvent through H-bond donors and H-bond acceptors.

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Densities, Viscosities, and Refractive Indices of Poly(ethylene glycol) 300 + 1,2-Ethanediol, 1,2-Propanediol, 1,3-Propanediol, 1,3-Butanediol, or 1,4-Butanediol Binary Liquid Mixtures

Cited by 20 publications

References 51 publications

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

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

Physicochemical Properties of Choline Chloride/Acetic Acid as a Deep Eutectic Solvent and Its Binary Solutions with DMSO at 298.15 to 353.15 K

Thermodynamics Properties and Internal Interactions of Ether-Group Functionalized Thiocyanate Ionic Liquid 1-(2-Methoxyethyl)-3-Methylimidazolium Thiocyanate and Its Mixtures with 1,4-Butyrolactone or Propylene Carbonate

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