Volumetric properties of some n-alkoxyethanols with alkyl acetates at the temperature 298.15 K

The excess molar volumes VE for binary liquid mixtures (n-alkoxyethanols methyl acetate, ethyl acetate, propyl acetate) have been measured as a func tion of composition using a continuous dilution dilatometer at 298.15 K and atmospheric pressure over the whole mole fraction range. The n-alkoxyethan ols are ethylene glycol monomethyl ether, diethylene glycol monomethyl ethe r, triethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and diethylene glycol monobutyl ether. The V-E for each of the mixtures are negative with the exception of propyl acetate + ethylene glycol monomethyl ether and change sign for methyl acetate + ethyl acetate + ethylene glycol monomethyl ether, or diethylene glycol monobutyl ether and ethyl acetate ethylene glycol monomethyl ether. For each case, the V-E increases as the polar head group of the alkoxyethanol increases and decreases with increasi ng alkyl chain-length. The excess partial molar volume (V) over bar (E)(i) of the components are evaluated from the V-E results. The results are discu ssed on the basis of molecular interaction present in alkoxyethanol alkyl a cetate mixtures.