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 a s a function of mole fraction at 298.15, 303.15, 308.15, 313.15, and 3 18.15 K. These results are expressed as a power series equation for te mperature and mixture composition dependences, and values of the compu ted coefficients are given. The isobaric thermal expansion coefficient s for the mixtures are estimated from density measurements. These data are compared with those obtained from equations derived by the differ entiation of Lorentz-Lorenz and Eykman relationships. The refractive i ndices of the mixtures are also used to test the validity of the mixin g rules at different temperatures. Furthermore, attempts are made to e stimate the changes in isobaric thermal expansion coefficients of the mixtures.