Abstract
This work reports density and viscosity data for binary system of polyethylene glycol 200 (PEG) (1) + dimethyl sulfoxide (DMSO) (2) over the whole concentration range at T = (298.15, 303.15, 308.15, 313.15, and 318.15) K as a function of composition under atmospheric pressure. From experimental density and viscosity data, the excess molar volume (VmE), viscosity deviation (Δη), the excess Gibbs free energies of activation for viscous flow (Δ(G*)E), and the apparent molar volumes (Vφ,i) were calculated. The VmE, Δη, and Δ(G*)E were fitted to a Redlich–Kister equation to obtain the coefficients and to estimate the standard deviations between the experimental and calculated quantities; meanwhile, based on the kinematic viscosity data, the viscous flow thermodynamic parameters were also calculated. In addition, based on FTIR and UV–vis spectra for the binary system of PEG (1) + DMSO (2) with various concentrations, the intermolecular interaction of PEG with DMSO was discussed.
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