A spectroscopic study of polyelectrolyte solutions under shear

Gason, S. J., Cooper-White, J., Dunstan, D. E. and Boger, D. V. (2001) A spectroscopic study of polyelectrolyte solutions under shear. Polymer, 42 16: 6981-6989. doi:10.1016/S0032-3861(01)00201-4


Author Gason, S. J.
Cooper-White, J.
Dunstan, D. E.
Boger, D. V.
Title A spectroscopic study of polyelectrolyte solutions under shear
Journal name Polymer   Check publisher's open access policy
ISSN 0032-3861
Publication date 2001
Sub-type Article (original research)
DOI 10.1016/S0032-3861(01)00201-4
Volume 42
Issue 16
Start page 6981
End page 6989
Total pages 9
Place of publication Oxford
Publisher Elsevier Sci Ltd
Language eng
Abstract The chain segment orientation of the polyelectrolyte poly(styrene sulfonate), PSS, in glycerol solutions under shear have been studied using a novel Ultra Violet rheo-optic technique. The extinction coefficient of the polyelectrolyte in solution, E, was measured using unpolarised light perpendicular to the direction of flow and is shown to decrease upon the application of shear. When the incident light was polarised with the direction of shear the reduced change in extinction coefficient of the polyelectrolyte became more negative with shear. For light polarised perpendicular to the shear direction the reduced change in extinction coefficient of the polyelectrolyte increased, became more positive, with the application of shear. There was no shear-induced change in the reduced change in extinction coefficient of the polyelectrolyte backbone for light polarised at 67 degrees to the direction of shear. All shear-spectroscopic behaviour may be explained by the alignment of the polarised PSS monomer units in the direction of shear. The maximum dichroic ratio for the polyelectrolyte chain is related to the chain polarisability and was predicted from the angular dependence of the change in extinction measurements to be approximately 2.35. Crown Copyright (C) 2001 Published by Elsevier Science Ltd. All rights reserved.
Keyword Polymer Science
rheo-optic
poly(styrene sulfonate)
shear
Birefringence
Relaxation
Rheometry
Rheology
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Wed, 19 Sep 2007, 16:26:02 EST