Measurement and modeling of density and viscosity of the NaClO4 + H2O + poly(ethylene glycol) system at various temperatures

The densities and viscosities of unsaturated solutions of sodium perchlorate + poly(ethylene glycol) + water were experimentally measured at temperatures of 288.15, 298.15 and 308.15 K. The solution concentrations of poly(ethylene glycol) with an average molecular weight of 4000 ranged from 0.25 to 33.91 (mass%) and from 10.12 to 37 (mass%) of NaClO4. The electrolyte and polymer non-random two liquid models were extended for representing of the excess molar volume and the dynamic viscosity of the above system. At these specific temperatures, the model correlations compared favorably with the experimental data for both the density and the viscosity.

► Density and viscosity of the NaClO4 + H2O + PEG 4000 system were measured. ► The experimental data were obtained at T = (288.15, 298.15 and 308.15) K. ► The Chen-NRTL model was extended to correlate the experimental data. ► Both properties increase as temperature increases. ► A good agreement between experimental and correlated data was obtained.