Rheology of concentrated suspensions
Article first published online: 9 MAR 2003
Copyright © 1971 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 15, Issue 8, pages 2007–2021, August 1971
How to Cite
Chong, J. S., Christiansen, E. B. and Baer, A. D. (1971), Rheology of concentrated suspensions. J. Appl. Polym. Sci., 15: 2007–2021. doi: 10.1002/app.1971.070150818
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 31 MAR 1971
- Manuscript Received: 15 SEP 1970
The dependence of the viscosities of highly concentrated suspensions on solids concentrations and particle size distributions is investigated by using an orifice viscometer. Based on the extensive amount of data on pertinent systems, an empirical equation which correlates the relative viscosities of suspensions (or relative moduli of filled polymeric materials) as a function of solids concentrations and particle size distributions is proposed. The equation has a constant which characterizes size distributions of spherical particles and can be determined experimentally without measuring viscosities. For uniform-size spherical particles, it reduces to the well-known Einstein equation at dilute solids concentrations.