As part of a study on the molecular interactions between esters and ethers; density, viscosity and speed of sound data were measured for
butyl ethanoate + ether mixed solvents. From these data, excess volumes V
E
, deviation in viscosity ∆η, isentropic compressibility KS ,
deviation in isentropic compressibility ∆ KS , intermolecular free length Lf , internal pressure πi , and the excess intermolecular free length
Lf
E
, excess internal pressure πi
E
, were deduced. These excess or deviation properties were fitted to the Redlich-Kister type equation.
Further the experimental mixture viscosities were correlated using Frenkel, Heric, and McAllister (four-body) models. The studied excess
or deviation properties were found to be both positive and negative. These results were interpreted in terms of intermolecular interactions
and structural effects
Key words: density; viscosity; speed of sound; excess volume; butyl ethanoate; interaction parameters
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