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Ordering in Bio‐Polyelectrolyte Chitosan Solutions
Author(s) -
David Laurent,
Montembault Alexandra,
Vizio Nadège,
Crépet Agnès,
Viton Christophe,
Domard Alain,
Morfin Isabelle,
Rochas Cyrille
Publication year - 2005
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.200550437
Subject(s) - polyelectrolyte , polymer , dissociation (chemistry) , scaling , chitosan , materials science , polymer chemistry , charge density , ionic strength , chemical physics , chemical engineering , chemistry , aqueous solution , physics , organic chemistry , mathematics , composite material , geometry , quantum mechanics , engineering
The scaling of the polyelectrolyte scattering peak in chitosan solutions, as deduced from the relation q max ∼ c p α was studied by synchrotron SAXS as a function of the charge density of the polymer. We observe a variation in the α exponent corresponding to the limit of the ionic condensation, by varying the degree of acetylation of the polymer. The nature of the solution medium also affects the polyelectrolyte peak, and it is shown that in alcoholic/water mixtures, the lower dissociation of the acid induces a lower charge density, thus influencing the polyelectrolyte ordering.