Effect of inorganic salts on the main parameters of the dilute aqueous poly(vinylpyrrolidone) solutions

Salamova U., Rzaev Z., Altindal Ş., Masimov A.

POLYMER, vol.37, no.12, pp.2415-2421, 1996 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 12
  • Publication Date: 1996
  • Doi Number: 10.1016/0032-3861(96)85353-5
  • Journal Name: POLYMER
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2415-2421
  • Gazi University Affiliated: Yes


The effect of inorganic salts (cosolute) on the main parameters of dilute aqueous poly(vinylpyrrolidone) (PVP) solutions, such as cloud points, phase diagram, theta 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 theta temperature and intrinsic viscosity which is caused by effect of the cosolute ions in enhancing the segment-segment interactions. (C) 1996 Elsevier Science Ltd.