High pressure viscosity and density measurements of the binary mixture tridecane + 2,2,4,4,6,8,8-heptamethylnonane

Abstract

The dynamic viscosity η of the binary mixture tridecane + 2,2,4,4,6,8-heptamethyl-nonane has been measured in the temperature range 293.15-353.15K (in progressive 10 K steps) at pressures 0.1,20,40,60,80 and 100 MPa. The system is described by 9 molar fractions (0 to 1 in 0.125 progressive steps). The density ρ has been measured at pressures from 0.1 to 65 MPa in progressive 5 MPa steps. The whole set of experimental data represents 378 points for η and 882 for ρ. The measurements of η allow to determine the excess viscosity η^E and the excess activation energy of viscous flow ΔG^E versus pressure, temperature and composition.

Key Words:

• Density
• excess activation energy of viscous flow
• excess viscosity
• high pressure