INTERPRETATION OF PREFERENTIAL ADSORPTION USING RANDOM-PHASE-APPROXIMATION THEORY

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