Date of Award


Publication Type

Master Thesis

Degree Name



Civil and Environmental Engineering

First Advisor

Asfour, A. A.


Engineering, Chemical.




The effects of polymers used as viscosity index improvers in lubricating oils are of interest to the petrochemical industry. Polymers are used to reduce the thinning effect of temperature on viscosity. The densities and kinematic viscosities of four viscosity index improvers at five concentrations were measured at $-20,\ -10$, 0, 10, 20, 40, 60, 80, 100, 120, and 150$\sp\circ$C in a 95% saturate base oil. Various models for liquid viscosity prediction were tested using the experimental data. The intrinsic viscosities were calculated using the equations proposed by Huggins (1942), Kraemer (1938), Schulz and Sing (1945), and Martin (1942) as a measure of polymer volume. The solutions were found to be non-Newtonian at $-20\sp\circ$C except in the case of polymethacrylate addition where the polymer is believed to act as a pour point depressant. The largest thickening effect was obtained with an olefin copolymer whereas only the polymethacrylate and dispersed olefin copolymer displayed increasing effect on solution viscosity with temperature.Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1996 .L365. Source: Masters Abstracts International, Volume: 37-01, page: 0306. Adviser: A. A. Asfour. Thesis (M.A.Sc.)--University of Windsor (Canada), 1997.