Date of Award
12-1993
Degree Name
Master of Science
Department
Chemical and Paper Engineering
Department
Paper Engineering, Chemical Engineering and Imaging
First Advisor
Dr. James E. Kline
Second Advisor
David K. Peterson
Access Setting
Masters Thesis-Open Access
Abstract
When using a cup and bob viscometer, it has long been recognized that errors in the viscosity measurement can arise from several factors, among them slip. Slip is a phenomenon which occurs when there are slipping layers in the fluid under shear, causing a non-uniform velocity gradient to be generated across the gap of the cup and bob viscometer. A layer of fluid at either the bob or cup wall moves faster than the adjoining layers, causing the slipping effect. This leads to a low viscosity calculation for the fluid.
In this study, experiments with coating formulations were conducted using the Hercules high shear viscometer to measure slip. The Hercules viscometer could measure a slip velocity for different formulations, however, negative slip values were generated. It was concluded that these values were the result of the generation of a negative velocity gradient caused by a bob-driven viscometer.
Recommended Citation
Krieger, Daniel Parker, "The Slip Velocity of Coating Formulations Using the High-Shear Viscometer" (1993). Masters Theses. 4912.
https://scholarworks.wmich.edu/masters_theses/4912