Issue 8, 2008
From the journal:

Soft Matter

Shear banding and rheochaos in associative polymer networks

J. Sprakel,*ab   E. Spruijt,a   M. A. Cohen Stuart,a   N. A. M. Besseling,c   M. P. Lettingad  and  J. van der Guchta  

* Corresponding authors

a Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB, Wageningen, The Netherlands
E-mail: joris.sprakel@wur.nl
Tel: +31-317-485595

b Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands

c Section NanoStructured Materials, Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands

d IFF, Institut Weiche Materie, Forschungszentrum Jülich, D-52425 Jülich, Germany

Abstract

We present experimental evidence of an instability in the shear flow of transient networks formed by telechelic associative polymers. Velocimetry experiments show the formation of shear bands, following a complex pattern upon increasing the overall shear rate. The chaotic nature of the stress response in transient flow is indicative of spatiotemporal fluctuations of the banded structure. This is supported by time-resolved velocimetry measurements.

Graphical abstract: Shear banding and rheochaos in associative polymer networks

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Article information

DOI
https://doi.org/10.1039/B803085E
Article type
Paper
Submitted
22 Feb 2008
Accepted
14 Apr 2008
First published
20 Jun 2008

Soft Matter, 2008,4, 1696-1705

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Shear banding and rheochaos in associative polymer networks

J. Sprakel, E. Spruijt, M. A. Cohen Stuart, N. A. M. Besseling, M. P. Lettinga and J. van der Gucht, Soft Matter, 2008, 4, 1696 DOI: 10.1039/B803085E

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