Viscometric and volumetric study of dilute aqueous solutions of binary and ternary poly(ethylene glycol)/poly(vinyl alcohol) systems at different temperatures

✍ Scribed by Alireza Salabat; Abbas Mehrdad

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 187 KB
• Volume: 157
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/j.molliq.2010.08.009

✦ Synopsis

Poly (vinyl alcohol) Viscosity of polymer mixtures Density of polymer mixtures

Densities and viscosities of binary and ternary systems of poly(ethylene glycol) (PEG) + H 2 O, poly(vinyl alcohol) (PVA) + H 2 O and PVA + PEG + H 2 O in the concentration range of 0.5-5 wt.% at different temperatures of 298.15, 308.15, 318.15 K, have been measured. The molecular weight of PVA and PEG were 67,000 and 3000, respectively. The mass ratio of PVA to PEG was selected as 75:25, 50:50, 25:75 in the ternary solutions. From density data the apparent specific volumes were obtained and correlated using a semi empirical equation. From viscosity data, the relative, specific and intrinsic viscosities for binary and ternary mixtures were obtained. The compatibility or incompatibility of two different polymer chains was concluded by using densimetric and viscometric method at different temperatures.