Collect. Czech. Chem. Commun. 1995, 60, 1641-1652

Interpretation of Preferential Adsorption Using Random Phase Approximation Theory

Henri C. Benoît and Claude Strazielle

Centre de Recherches sur les Macromolécules, 67083 Strasbourg Cedex, France


It has been shown that in light scattering experiments with polymers replacement of a solvent by a solvent mixture causes problems due to preferential adsorption of one of the solvents. The present paper extends this theory to be applicable to any angle of observation and any concentration by using the random phase approximation theory proposed by de Gennes. The corresponding formulas provide expressions for molecular weight, gyration radius, and the second virial coefficient, which enables measurements of these quantities provided enough information on molecular and thermodynamic quantities is available.