Thermodynamic properties of n-alkoxyethanols + organic solvent mixtures: XVI. Excess molar volumes at 298.15 K for 2-alkoxyethanol + n-polyether systems

Excess molar volumes (V_m^E) at 298.15 K and atmospheric pressure for 2-methoxyethanol or 2-butoxyethanol + 2,5-dioxahexane, +2,5,8-trioxanonane, +3,6,9-trioxaundecane, +5,8,11-trioxapentadecane, or +2,5,8,11,14-pentaoxapentadecane, or for 2-ethoxyethanol + 2,5,8-trioxanonane, +3,6,9-trioxaundecane, or +5,8,11-pentaoxapentadecane have been obtained from densities measured with and Anton-Paar DMA 602 vibrating-tube densimeter.They are usually small in absolute value. It is due to a compensation between positive and negative contributions to the excess molar volume. For example, free volume effects present in solutions with the pentaether are compensated by the positive contribution to V_m^E from the rupture of dipole-dipole interactions between ether molecules.