Viscometric Studies of Binary Mixtures of Ethyl Acetoacetate with (C4-C9) Aliphatic Ketones at 298.15 K

摘要

Kinematic viscosities (v) of binary mixtures of ethyl acetoacetate (EAA) + aliphatic ketones (C4-C9) have been determined as a function of composition at 298.15 K. The dynamic viscosity (η), excess viscosity and excess Gibbs free energy of activation for viscous flow, (△G~(*E)) were also calculated. Excess viscosities (η~E) and excess Gibbs free energies of activation for viscous flow (△G~(*E)) were calculated from the experimental viscosity data and were fitted to a Redlich-Kister type polynomial. The excess viscosity shows negative deviations over the entire range of solvents composition for the mixtures of (ethyl acetoacetate) + butan-2-one, hexan-2-one, heptan-2-one, octan-2-one and nonan-2-one and a positive deviation for the binary mixtures of ethyl acetoacetate + pentan-2-one system. The (△G~(*E)) were all positive over the entire range solvents composition for the binary mixtures. The experimental results were used to test some semi-empirical equations to correlate viscosity-composition data.