Excess Properties and Spectroscopic Studies for Binary System of Polyethylene Glycol 200 (1) + Dimethyl Sulfoxide (2) at T = (298.15 to 318.15) K

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 (V m E ), viscosity deviation (Δη), the excess Gibbs free energies of activation for viscous flow (Δ(G*) E ), and the apparent molar volumes (V φ,i ) were calculated. The V m E , 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.

Sustainable and Low Viscous 1-Allyl-3-methylimidazolium Acetate + PEG Solvent for Cellulose Processing

“…It is well-known that low viscous solvents improve mass transport and enable faster kinetics of dissolution, which facilitates cellulose processing. It has been reported that the viscosity of PEG (48.2–58.8 mPa·s) is considerably less than that of [Amim][CH 3 COO] (88.9 mPa·s) [ 19 , 21 , 22 ], Therefore, after the addition of PEG to [Amim][CH 3 COO], [Amim][CH 3 COO]/PEG solvent is less viscous compared to [Amim][CH 3 COO], which was experimentally observed.…”

Volumetric behaviour of tetra-n-butyl ammonium bromide in various solvents at different temperatures

“…The value of coefficient B can be obtained from the slope of linear plot of (/ o -1) vs. C. Table 9 shows the values of B for all the solutions. The values of the B coefficient for all studied solvents at all studied temperatures are positive, indicating that the solute solvent interactions are strong [77,78] so TBAB ions behave as structure makers. Further, as temperature increases, B values decrease.…”

“…Further, as number of carbon atoms increases in alcohols, B-coefficient increase. Some thermodynamic parameters such as enthalpy (ΔH*), Gibbs free energy(ΔG*) and entropy (ΔS*) have also been evaluated from acoustic data by the following equations [76,77]:…”

“…The positive enthalpy suggests endothermic process in studied solutions. The negative entropy indicates that formation of the transition state is associated with an increase in order relative to the initial state [76,77]. This is expected when the free volume in the liquid has to be rearranged in order to provide sufficient space to the moving particles for jumping from their initial position to the activated transition state.…”

Coil Interpenetration, Segment Aggregation and Adsorption of PEG at Water/Air Interface

“…Spectrometric methods, such as NMR, have also been used to study interactions/conformations present in PEG solutions [17,18]. A purely phenomenological approach has been applied by Zhao et al by studying excess properties for PEG 200/DMSO solutions and correlated them to their viscosities [19]. Soltanpour et al have applied this phenomenological approach to study the dissolution of drugs in pyrrolidone, ethanol, and water [20,21].…”