Abstract
A systematic study of the phase behavior of products resulting from the interaction of oligomeric and high-molecular-mass styrenesulfonate anions with oligomeric and polymeric N-ethyl-4-vinylpyridinium cations in aqueous salt solutions was conducted for the first time. Unexpected and considerable differences in the stability of the resulting asymmetric polyelectrolyte complexes composed of a long cationic or anionic matrix and anionic (respectively cationic) oligomers of the same degree of polymerization were revealed. A mechanism of this phenomenon based on the difference in the conformational behavior of interacting polyions in concentrated salt solutions was suggested.
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