Abstract
Abstract The effect of inorganic salts (cosolute) on the main parameters of dilute aqueous poly(vinylpyrrolidone) (PVP) solutions, such as cloud points, phase diagram, θ temperature and viscosity was studied experimentally using various concentrations of salts and said polymer at varying temperatures. It is shown that, thermodynamic incompatibility of aqueous PVP-salts solutions strongly depends on the character of effect of salts (water-structure breakers or water-structure makers). Inclusion of salts into aqueous PVP solution leads to decreasing of the θ temperature and intrinsic viscosity which is caused by effect of the cosolute ions in enhancing the segment—segment interactions.
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