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Ion condensation in a polyelectrolyte gel
Author(s) -
Morfin Isabelle,
Horkay Ferenc,
Basser Peter J.,
Bley Françoise,
EhrburgerDolle Françoise,
Hecht AnneMarie,
Rochas Cyrille,
Geissler Erik
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200351023
Subject(s) - polyelectrolyte , divalent , sodium polyacrylate , ion , polymer , scattering , condensation , strontium , materials science , sodium , analytical chemistry (journal) , chemistry , polymer chemistry , optics , chromatography , thermodynamics , organic chemistry , physics , composite material , raw material
Anomalous small angle X‐ray scattering is used to determine the distribution of divalent ions in a neutralized polyelectrolyte gel of sodium polyacrylate in the vicinity of the volume transition. At the five different energies of the incident beam used to vary the contrast, the scattering curves have similar shapes, and are separated only by constant multiplying factors. This result, in conjunction with SANS results from the same sample, indicates that the divalent ion (strontium) is confined on the polymer backbone.