Phase separation in solutions of acrylic acid-2-Methyl-5-vinylpyridine (cas 140-76-1) polyampholytes

Add time:07/14/2019    Source:sciencedirect.com

The basic laws governing phase separation in solutions of the synthetic polyampholytes formed by acrylic acid and 2-methyl-5-vinylpyridine have been studied. A reversible equilibrium transition from true solution to a polymeric dispersion is observed when the pH of the medium or the polymer concentration is changed. The pH region for phase separation of solutions of the polyampholytes is determined by the composition and compositional non-uniformity of the copolymer but it does not depend on the molecular-mass distribution. Structure-formation occurs above a critical polymer concentration, whose value depends on the pH of the medium and the copolymer's composition.

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