B. Vishalakshi and Soumyadeb Ghosh
Polyelectrolyte complexes between carboxymethylcellulose and N-methylated poly(2-vinylpyridine), at a nonstoichiometric mixing ratio, were studied with viscometry, turbidimetry, electrophoresis, and optical spectroscopy. A gel-like structure was proposed for the nonstoichiometric polyelectrolyte complexes. Two steps of complex formation—ionic bond formation followed by its rearrangement—were identified. The conformational change of the polyelectrolyte chains in the complex, responsible for the slower and latter step, was followed by viscometry, and the results were interpreted on the basis of a model proposed for the kinetics of swelling of hydrogels.