Molar Heat Capacities, Densities, Viscosities, and Refractive Indices of Poly(ethylene glycols) + 2-Methyltetrahydrofuran at (293.15, 303.15, and 313.15) K

Molar heat capacities, C p, densities, ρ, dynamic viscosities, η, and refractive indices, n D, for the binary mixtures poly(ethylene glycol) 200 and poly(ethylene glycol) 400 + 2-methyltetrahydrofuran (MTHF) were determined at (293.15, 303.15, and 313.15) K using a Perkin-Elmer differential scanning calorimeter, an Anton Paar density meter, a Schott-Geräte AVS unit, and an Abbe refractometer, respectively. Excess molar volumes,, deviations of the dynamic viscosities, Δη, and deviations of the refractive indices, Δ R, were calculated at these temperatures. These properties were fitted to the Redlich−Kister equation.