Aqueous biphasic systems formed by nonionic polymers II. Concentration effects of inorganic salts on phase separation
| Autor: | A.U. Mahmudov, G. Z. Gasanova, M. N. Rodnikova, L.M. Miheeva, B.Yu. Zaslavsky, V.Yu. Levin, Nelli D. Gulaeva, Anna A. Borovskaya, N.M. Mestechkina, T. O. Bagirov |
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| Rok vydání: | 1987 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Polymers and Plastics Polyvinylpyrrolidone Chemistry Inorganic chemistry Ficoll Concentration effect Polymer chemistry.chemical_compound Colloid and Surface Chemistry Dextran Phase (matter) Polymer chemistry Materials Chemistry medicine Physical and Theoretical Chemistry Ethylene glycol medicine.drug |
| Zdroj: | Colloid & Polymer Science. 265:548-552 |
| ISSN: | 1435-1536 0303-402X |
| DOI: | 10.1007/bf01412510 |
| Popis: | Concentration effects of KSCN, KClO4, KI, KBr, KNO3, KCl, KF and K2SO4 on the compatibility of dextran with ficoll, polyvinylpyrrolidone and poly(ethylene glycol) at fixed polymer concentration ratios were studied in aqueous solution. The results obtained are considered in terms of the Patterson theory ofΔχ-effect. It is assumed that phase separation in an aqueous solution of two nonionic polymers results from the appearance of two different water structures in the vicinity of the phase polymers. The data obtained are considered in terms of the concept of “salting-in-salting-out” effects of neutral salts on aqueous solubility of biopolymers. The salt effects observed are attributed to two antagonistic influences of salts on the electrostatic (dipole-dipole) polymer-water interactions and on the water-water interactions in the vicinity of the phase polymers. |
| Databáze: | OpenAIRE |
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