Volume 106, Number 2, April 2014
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||25 April 2014|
New regime in polyelectrolyte solutions
1 Institut Charles Sadron, CNRS-UdS - 23 rue du Loess, 67034 Strasbourg cedex 2, France
2 Department of Physics, University of Florida - Gainesville, FL, USA
3 Laboratoire Léon Brillouin, CEA-Saclay - Saclay, France
4 Fraunhofer Institut für Angewandte Polymerforschung - Postdam, Germany
5 University of North Carolina at Chapel Hill - Chapel Hill, NC, USA
Received: 11 March 2014
Accepted: 8 April 2014
Usually polyelectrolyte solutions present a peak in the polyion/polyion structure factor for some value of the momentum transfer (scattering vector). We describe a new regime in dense polymer solutions, typically above , where is proportional to the concentration c of the solution. It is however not observed for all polyelectrolytes but only for those of intermediate stiffness, usually together with an ultimate regime where is proportional to and local orientational order prevails. This regime is robust against sample preparation and stable over time. We can understand it as jammed with randomly oriented persistent segments. This may explain why fully developed nematic order is so difficult to observe in synthetic polyelectrolytes.
PACS: 82.35.Rs – Polyelectrolytes / 61.05.cf – X-ray scattering (including small-angle scattering) / 61.05.fg – Neutron scattering (including small-angle scattering)
© EPLA, 2014
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