Volume 62, Number 4, May 2003
|Page(s)||588 - 594|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 May 2003|
Correlation length of hydrophobic polyelectrolyte solutions
Laboratoire des Fluides Organisés,
CNRS UMR 7125, Collège de France
11, place Marcelin Berthelot, 75005 Paris, France
2 Max-Planck-Institut für Kolloid und Grenzflächenforschung Am Mühlenberg 1, 14476 Golm, Germany
Corresponding author: email@example.com
Accepted: 14 March 2003
The combination of two techniques (Small Angle X-ray Scattering and Atomic Force Microscopy) has allowed us to measure in reciprocal and real space the correlation length ξ of salt-free aqueous solutions of a highly charged hydrophobic polyelectrolyte as a function of the polymer concentration , charge fraction f and chain length N. Contrary to the classical behaviour of hydrophilic polyelectrolytes in the strong-coupling limit, ξ is strongly dependent on f. In particular, a continuous transition has been observed from to when f decreased from 100% to 35%. We interpret this unusual behaviour as the consequence of the two features characterising the hydrophobic polyelectrolytes: the pearl necklace conformation of the chains and the anomalously strong reduction of the effective charge fraction.
PACS: 82.35.Rs – Polyelectrolytes / 61.10.-i – X-ray diffraction and scattering / 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling
© EDP Sciences, 2003
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