THE EFFECT OF TEMPERATURE ON THE DYNAMIC VISCOSITY OF ACETONE SUNFLOWER-SEED OIL MIXTURES

The effect of acetone on the dynamic viscosity of sunflower-seed oil w as studied under a dynamic heating regime at temeparuters ranging from 25 degrees C to 50 degrees C at 5 degrees C intervals. Acetone dramat ically reduced the viscosity of sunflower-seed oil. The reduction of v iscosity was far less with further addition of acetone. A linear relat ionship was found between the density of sunflower-seed oil and temper ature. The influence of a solvent on the density of the sunflower-seed oil/acetone solution can be accounted for by the mixing theory of ide al solutions, whereas the effect of temperature on the dynamic viscosi ty of the oil solution is best described by a modified Arrhenius equat ion.