Viscosity of Isomeric Octyl Alcohols as a Function of Temperature and Pressure

摘要

The viscosity of 2hyphen; and 3hyphen;octanol and 6hyphen;methylhyphen;3, 5hyphen;methylhyphen;3hyphen;, and 2hyphen;methylhyphen;3hyphen;heptanol has been measured as a function of temperature (minus;20deg;ndash;80deg;C) and pressure (0ndash;4 kbar). Specific structural differences exist in the temperature and pressure coefficients of isobaric viscosity; these differences are minimized, but still exist, when isochoric viscosities are compared. Viscous flow and dielectric relaxation of these liquids are compared, and it is concluded that the ratehyphen;determining steps are dissimilar. A previously proposed pressurehyphen;induced liquid structure transformation in these liquids could not be verified viscometrically.