Influence de la masse moléculaire,de la polydispersité et de la température sur les phénomènes de solvatation préférentielle de polystyrènes linéaires dans différents mélanges de solvant

This paper describes the study of preferential adsorption of polystyrene in a solvent mixture as a function of different parameters. In the first place the influence of the density of intramolecular segments (the effect of the molecular weight and the polydispersity of the polymer) on this phenomenon was examined. The effect of the temperature on the solvation coefficient was also considered. Certain experimental results were found to be in good agreement with the thermodynamic theories of preferential adsorption. The lack of the knowledge concerning the variation of the thermodynamic interaction parameters, with the density of intramolecular segments and the temperature, did not permit a rigorous quantitative study.