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Protonation of polyaniline with lightly sulfonated polystyrene
Author(s) -
Fu Yueping,
Weiss R. A.
Publication year - 1996
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1996.030170708
Subject(s) - polyaniline , protonation , polystyrene , sulfonic acid , polymer chemistry , solvent , salt (chemistry) , base (topology) , chemistry , aqueous solution , materials science , polymer , organic chemistry , polymerization , ion , mathematical analysis , mathematics
Protonation of polyaniline base with lightly sulfonated polystyrene in polar solvents such as dimethyl sulfoxide and N ‐methyl‐2‐pyrrolidone was investigated by UV‐Vis absorption spectra. As the molar ratio of sulfonated polystyrene/polyaniline increases, the conversion from polyaniline base form to salt form is observed owing to increased protonation. The isosbestic point clearly shows that quinoid unit and semiquinoid unit are in equilibrium. They are functions of the sulfonic acid concentration and solvent media.