DENSITIES, REFRACTIVE-INDEXES, SPEEDS OF SOUND, AND VISCOSITIES OF DIETHYLENE GLYCOL DIMETHYL ETHER PLUS BUTYL ACETATE AT 298.15-K, 303.15-K, 308.15-K, 313.15-K, AND 318.15-K

Densities, viscosities, refractive indices and speeds of sound of the diethylene glycol dimethyl ether + butyl acetate system are measured as a function of mole fraction at 298.15, 303.15, 308.15, 313.15, and 318.15 K. These results are expressed as a power series equation for temperature and mixture composition dependences, and values of the computed coefficients are given. The isobaric thermal expansion coefficients for the mixtures are estimated from density measurements. These data are compared with those obtained from equations derived by the differentiation of Lorentz-Lorenz and Eykman relationships. The refractive indices of the mixtures are also used to test the validity of the mixing rules at different temperatures. Furthermore, attempts are made to estimate the changes in isobaric thermal expansion coefficients of the mixtures.