VISCOSITY OF BINARY-MIXTURES OF PROPYLAMINE WITH ALKANOLS AT MODERATELY HIGH-PRESSURES

Experimental measurements are reported for the viscosity and the density of the four binary mixtures of propylamine with methanal, ethanol, 1-propanol, and 1-butanol. The systems studied exhibit self-association and strong cross-association due to the strong hydrogen bonding between the hydroxyl and the amine groups. The measurements were conducted at 25 degrees C and in a pressure range from atmospheric to 520 bar for the viscosity and from atmospheric to 340 bar for the density. A self-centering falling body viscometer has been used for the viscosity measurements and a vibrating tube densitometer for the density measurements. Calculated excess volumes and compressibilities are reported.