Title
Dilute Polyacrylamide Solutions under Uniaxial Extensional Flow
Abstract
The shear and extensional viscosities, dynamic viscosities, and normal forces of a series of polyacrylamide solutions of varying molar mass have been determined in a Boger fluid at varying concentrations. The critical strain rate under extensional flow that can be defined from the departure from Newtonian behavior, εc, was found to be independent of the concentration and varied in the same way as the critical coil−stretch strain rate with the molar mass. A quantitative comparison indicated that εc is a decade lower than the strain rate predicted to characterize the coil−stretch transition. This difference indicates that εc reflects the average deformation of the chains over the range of strain rates.
Disciplines
Chemistry | Polymer Chemistry
Recommended Citation
Pelletier, E., Viebke, C., Meadows, J., & Williams, P. A. (2003) Dilute Polyacrylamide Solutions under Uniaxial Extensional Flow. Langmuir American Chemical Society, 19(3), 559-565
Digital Commons Citation
Pelletier, E; Viebke, C; Meadows, J; and Williams, Peter A., "Dilute Polyacrylamide Solutions under Uniaxial Extensional Flow" (2003). Centre for Water Soluble Polymers. Paper 7.
http://epubs.glyndwr.ac.uk/cwsp/7
Comments
Copyright © 2003 American Chemical Society Metadata only available from this repository This article was originally published in Langmuir - the Journal of the American Chemical Society in 2003. The full article can be found at http://pubs.acs.org