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Abstract
The phase behavior of mixed acidic solutions of the high-molecular-mass cationic polyelectrolyte poly(1,2-dimethyl-5-vinylpyridinium methyl sulfate) and PAA at a PAA-to-polycation ratio of <1 base-mol/base-mol in narrow pH ranges at 6–30°C is studied. The reduction of Cu2+ ions in solutions and dispersions of interpolyelectrolyte complexes yields copper nanoparticles. It is shown that the mean-square diameters of nanoparticles formed in solutions of nonstoichiometric polyelectrolyte complexes are much smaller than those obtained in solutions of each component of the polyelectrolyte complex under the same conditions. These values decrease as the thermodynamic quality of the solvent with respect to the polymer of the pseudomatrix nonstoichiometric polyelectrolyte complex worsens. The experimental data may be explained in terms of the theoretical concept of pseudomatrix formation of a new phase in polymer solutions.
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