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This work reports experimental dynamic viscosity (η) and density (ρ) for 1,3-butanediol (BTD) (1) and dimethyl sulfoxide (DMSO) (2) binary systems at T = (273.15-318.15) K and p = 0.1 MPa. From the experimental ρ and η data, the excess molar volumes (VmE) values, viscosity deviation (Δη) values, partial molar volumes (V1 and V2) values, apparent molar volume (Vφ,1 and Vφ,2) values, excess free energies of activation (ΔG*E) values and isobaric thermal expansion coefficient (αp) values were, respectively, obtained. After that, a Redlich-Kister equation was used to fit VmE, Δη and ΔG*E values. The mixtures exhibited positive VmE with a maximum at x1 = 0.55, which became more pronounced after temperature increased. The obtained standard deviations (σ) values were compared with literature data and conclusion about application modus was drawn. From FTIR, UV-vis, FTIR and NMR spectral information, intermolecular interaction between BTD and DMSO was systemically explored. [ABSTRACT FROM AUTHOR]

Thermophysical properties for binary mixture of tetraethylene glycol (T4EG) (1) + 1,2-ethanediamine (EDA) (2), a potential scrubbing solution for the absorption of CO2, are very important as well as lacking in the literatures. This work reports densities and viscosities over the entire concentration range for the binary mixture atT = (293.15-318.15) K under atmospheric pressure. According to the experimental density and viscosity values, the mixtures’ excess molar volume (VmE), absolute viscosity deviation (∆η), excess free energies of activation (∆G E), apparent molar volumes, partial molar volumes and isobaric thermal expansion coefficient were calculated, respectively. Meanwhile, theVmE, ∆ηand ∆G Evalues were fitted by a Redlich–Kister equation to obtain coefficients. To further study, the Fourier transform infrared, UV-Vis and fluorescence spectra of T4EG + EDA mixtures with various concentrations were measured, and the intermolecular interaction of T4EG with EDA was also discussed as the formation of –OCH2CH2O–H···N(H2)CH2CH2(H2)N···. [ABSTRACT FROM AUTHOR]

This report presents the density and viscosity data of binary system 2-butoxy ethanol (BOE) + water (H2O) over the entire composition range atT = (298.15, 303.15, 308.15, 313.15 and 318.15) K. On the basis of density and viscosity values, the excess molar volumes (), viscosity deviations (∆ν) and excess Gibbs free energies of activation (ΔG*E) were calculated. The computed results were fitted with the Redlich–Kister equation to derive the coefficients and estimate the standard deviations between the experimental and calculated values. The values ofwere negative, whereas the values of∆νwere positive over the entire composition range. On the basis of the kinematic viscosity data, enthalpies, entropies and Gibbs energies of activation for the viscous flow were also calculated. Moreover, the intermolecular interaction of BOE with H2O was discussed on the basis of UV-Vis and FTIR spectral data. [ABSTRACT FROM AUTHOR]

Thermophysical property data for the binary system of 1-methoxy-2-propanol (PGME) + dimethyl sulfoxide (DMSO), a potential candidate for use as the scrubbing liquid for the absorption of SO2, are lacking in the literature. This paper presents experimental data at 0.1 MPa on the density and viscosity for this binary system measured over the whole composition range atT = (298.15, 303.15, 308.15, 313.15 and 318.15) K. The extended combined uncertaintyUcwith a 0.95 level of confidence for the pycnometer method and Ubbelohde viscometer used in this study is 0.002 g·cm−3and 0.028 cm2·s−1, respectively. The PGME + DMSO system shows negative values of the excess molar volume at all temperatures and compositions. Based on UV-Vis and FTIR, the intermolecular interaction of PGME with DMSO was confirmed as hydrogen bonding between the hydroxyl hydrogen atom in PGME and the oxygen atom in DMSO. [ABSTRACT FROM PUBLISHER]

Density and dynamic viscosity data were measured over the whole concentration range for the binary system 1,4-butanediol (1) + water (2) atT = (293.15, 298.15, 303.15, 308.15, 313.15, and 318.15) K as a function of composition under atmospheric pressure. Based on density and dynamic viscosity data, excess molar density (ρE), dynamic viscosity deviation (Δν) and excess molar volume (VmE) were calculated. From the dynamic viscosity data, excess Gibbs energies (ΔG*E), Gibbs free energy of activation of viscous flow (ΔG*), enthalpy of activation for viscous flow (ΔH*) and entropy of activation for viscous flow (ΔS*) were also calculated. TheρE, VmE, Δνand ΔG*Evalues were correlated by a Redlich−Kister-type function to obtain the coefficients and to estimate the standard deviations between the experimental and calculated quantities. Based on FTIR and UV spectral results, the intermolecular interaction of 1,4-butanediol with H2O was discussed. [ABSTRACT FROM PUBLISHER]