Abstract
AbstractThe interaction of poly(vinyl pyrrolidone) with a series of cosolutes has been studied by means of viscosity, solubility, dialysis, and electrophoresis methods. The cosolutes comprise a number of mono‐ and divalent acids and their salts, and most of the natural amino acids. It is found that appreciable interaction occurs with divalent acids and salts, with hydroxy acids, aromatic acids, and with amino acids which possess either aromatic or other ring structures. The interactions are probably related to a saltingout process, and a qualitative mechanism is suggested which accounts for the observed charge and specific effects in terms of dielectric attraction and repulsion between the cosolute anion and the pattern of polar and nonpolar sections of the PVP molecule.
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