Collect. Czech. Chem. Commun. 1985, 50, 2146-2158

Volume properties of dilute aqueous solutions of poly(oxyethylene) and its low molecular models

Antonín Sikora

Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, 162 06 Prague 6


The densities were measured of pure liquid mono-, di-, tri-, and poly(oxyethylene) up to the molar mass 20 000, of 3-oxa-1-butanol and 3,6-dioxa-1-heptanol, 3-oxa-1-pentanol and 3,6-dioxa-1-octanol, 3,6-dioxa-1-decanol, 2,5-dioxahexane, 2,5,8,11-tetraoxadodecane and 2,5,8,11,14-pentaoxapentadecane, 3,6-dioxaoctane and 3,6,9-trioxaundecane and their aqueous solutions at the mass concentrations smaller than 0.02 in the temperature range 15-50 °C. The experimental data thus obtained were used to calculate values of the apparent specific volume at infinite dilution, specific expansion at infinite dilution, excess limiting partial specific volume and excess limiting molar expansibility of the dissolved compound. The suitability of these values as criteria of hydrophobicity of the respective compounds was verified. The volume contributions of homologous and end groups were calculated.