Kinematic viscosities of binary liquid mixtures of 2-butanone with 1,2-propanediol

Kinematic viscosities of the binary 2-butanone (1) + 1,2-propanediol (2) solvent system have been measured for mixtures covering the whole miscibility range expressed by 0 less than or equal to x(i) less than or equal to 1, at 19 temperatures in the range -10 less than or equal to t/degreesC less than or equal to 80. The measured values have been used to test empirical equations that express the kinematic viscosities as functions of the composition and temperature. Excess kinematic viscosities (nu(E)) have also been calculated. Sign and magnitude of these quantities are discussed in terms of type and nature of specific intermolecular interactions. Furthermore, derived quantities such as thermodynamic parameters of viscous flow (DeltaGdouble dagger, DeltaHdouble dagger and DeltaSdouble dagger), are analyzed on the basis of Eyring's model. All the investigated excess mixing properties indicate the probable existence of stable two-component adducts in this binary solvent system.