VISCOSITY BEHAVIOR OF ASSOCIATED LIQUIDS AT LOWER TEMPERATURES AND VAPOR-PRESSURES

Kinematic viscosity measurements on 13 monohydric alcohols to a lower limit of ca. -50 °C and on six dihydric alcohols to ca. -10 °C are reported. Numerical analysis of the variation of viscosity (η) with absolute temperature (T) shows that whereas at first rapid increases in d log η v1/2/d(1/T)θ (in which vis the specific volume and 8 a constant) occur at lower temperatures the plots of log ηv1/2 vs. 1/Tθ become linear, thereby simulating under these latter conditions the behavior of nonassociated liquids. Using the vapor pressures of the preceding paper, we fitted the results to a three-constant equation expressing the variation of viscosity with vapor pressure. © 1979, American Chemical Society. All rights reserved.