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Structural evidence of charge renormalization in semi-dilute solutions of highly charged polyelectrolytes |
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| Authors: | W Essafi F Lafuma CE Williams |
| Institution: | (1) LURE, CNRS-CEA-MESR, Université Paris-Sud, Batiment 209 D, 91405 Orsay Cedex, France, FR;(2) Laboratoire de Physico-Chimie Macromoléculaire, CNRS-Paris VI-ESPCI, 10 rue Vauquelin, 75231 Paris, France, FR;(3) Laboratoire de Physique de la Matière Condensée (URA 792), CNRS-Collège de France, 11 place Marcelin-Berthelot, 75231 Paris, France, FR |
| Abstract: | We show experimentally that Manning counterion condensation also leads to a renormalization of the charge density at high concentrations of highly charged, flexible, hydrophilic polyelectrolytes. Investigations by small angle neutron and X-ray scattering of semi-dilute solutions of poly(acrylamide-co-sodium-2-acrylamido-2-methylpropane sulfonate) at different charge densities above the condensation threshold, show that the scattering function is invariant with the charge density. Received 16 June 1998 |
| Keywords: | PACS 61 25 Hq Macromolecular and polymer solutions polymer melts swelling - 61 10 Eq X-ray scattering (including small-angle scattering) - 61 12 Ex Neutron scattering techniques (including small-angle scattering) |
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