N. Clarke
Polymer blends in a contraction-expansion flow
Clarke, N.; De Luca, E.; Bent, J.; Buxton, G.A.; Gough, T.; Grillo, I.; Hutchings, L.R.
Authors
E. De Luca
J. Bent
G.A. Buxton
T. Gough
I. Grillo
Lian Hutchings l.r.hutchings@durham.ac.uk
Academic Visitor
Abstract
We have probed the coupling between flow and concentration fluctuations in polymer blends using small-angle neutron scattering. We utilized a recirculating cell with a slot die, enabling us to measure the behavior at the entrance, within and at the exit of a contraction-expansion flow. While, as expected, anisotropy was observed in all nonquiescent experiments, the correlation lengths associated with the concentration fluctuations are found to be "stretched" more in the direction perpendicular to the flow at all positions along the centerline of the flow, except at the slot die exit. To gain insight into the observations, we present calculations of the scattering based on a multiscale approach, which bridges the gap between macroscopic Newtonian fluid dynamics and the convection of nanoscale concentration fluctuations. However, we find that this model contains insufficient physics to correctly describe our observations. Consequently, we argue that the deformation of the correlation length is primarily due to the coupling between weakly non-Newtonian stresses and thermodynamics.
Citation
Clarke, N., De Luca, E., Bent, J., Buxton, G., Gough, T., Grillo, I., & Hutchings, L. (2006). Polymer blends in a contraction-expansion flow. Macromolecules, 39(22), 7607-7616. https://doi.org/10.1021/ma0610966
Journal Article Type | Article |
---|---|
Publication Date | Oct 1, 2006 |
Deposit Date | May 11, 2007 |
Journal | Macromolecules |
Print ISSN | 0024-9297 |
Electronic ISSN | 1520-5835 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 39 |
Issue | 22 |
Pages | 7607-7616 |
DOI | https://doi.org/10.1021/ma0610966 |
You might also like
"Bending to stretching" transition in disordered networks
(2007)
Journal Article
Well defined multi end-functionalized polymers as additives to modify surfaces and interfaces
(2006)
Conference Proceeding
Fluorocarbon end-functionalized polymers from poly(arylether) dendritic initiators
(2006)
Conference Proceeding
Surface-active fluorocarbon end-functionalized polylactides
(2006)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search