2022   01   en   p.03-07 A.A. Hasanov, X.T. Hasanova, S.R. Bagirova,
Influence of some salts on binodaline of biphasic systems formed by nonionic polymers


The effect of salts KSCN, KI, KBr, KCI, KClO4, KF, K2SO, and NH4CI, LiCI, NaCl, KCI, CsCl on the binodials of the phase diagrams for aqueous biphasic dextran-polyvinylpyrrolidonel and dextran-polyethylene glycol systems was studied. It is established that the K-salts present at the concentrations of 0.1 and 0.5 mol/kg alter the binodials of the phase diagrams for the above systems. The effect of a salt is found to be related to the lyotropy of the salt quantified by the salt molal surface tension increment. It is assumed that phase separation in an aqueous polymer biphasic system is affected by the presence of a salt mainly due to the effect of the salt on the structure and/or state of water in the system.

Keywords: Phase systems; phase separation; inorganic salts; lyotropic series; partition technique, polymers.
PACS: 61.20.Ne,66.20.+d,82.60.Lf,61.25.Hq.

Received: 09.12.2021


Institute for Physical Problems, Baku State University, Z. Khalilov 23, Baku, AZ 1148, Azerbaijcan
E-mail: xaverhasanova2019@rambler.ru

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