Abstract
Preferential adsorption in bromoform (1), benzene (2), and polymer (3) systems has been studied by two different methods: sedimentation equilibrium in a density gradient and light scattering. The preferential adsorption parameters were estimated for mixtures containing polystyrene and poly(α-methylstyrene) as the polymer component. In both systems, inverse adsorption was observed, in which the poor solvent bromoform is selectively adsorbed by the polymer. This occurred at low bromoform concentrations in the mixture but as the amount of bromoform increased there was a reversion to preferential adsorption of the benzene. An attempt to analyse the data in terms of the thermodynamic interactions indicated that agreement between theory and experimental data could only be obtained if it was assumed that inclusion of a ternary interaction parameter was necessary in the theoretical treatment.
Similar content being viewed by others
Article PDF
References
R. Buchdahl, H .A. Ende, and L. H. Peebles, J. Polym. Sci., Part C, 1, 143 (1963).
R. Buchdahl, H .A. Ende, and L. H. Peebles, J. Polym. Sci., Part C, 1, 153 (1963).
J. M. G. Cowie and P. M. Toporowski, Eur. Polym. J., 5, 493 (1969).
A. Zivny, J. Pouchly, and K. Sole, Collect. Czech. Chem. Commun., 32, 2753 (1967).
C. Strazielle and H. Benoit, J. Chim. Phys., 58, 675 (1961).
R. L. Baldwin and K. E. van Holde, Adv. Polym. Sci., 1, 451 (1960).
J. Vinograd and J. E. Hearst, Prog. Chem. Org. Nat. Prod., 20, 372 (1962).
B. E. Read, Trans. Faraday Soc., 56, 382 (1960).
J. M. G. Cowie and S. By water, J. Macromol. Chem., 1, 581 (1966).
J. M. G. Cowie, J. Pure Appl. Chem., in press.
K. W. Suh and D. W. Liou, J. Polym. Sci., Part A-2, 6, 813 (1968).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cowie, J., Dey, R. & McCrindle, J. A Comparative Study of Preferential Adsorption in Bromoform (1), Benzene (2), and Polymer (3) Systems by Light Scattering and Density Gradient Ultracentrifugation. Polym J 2, 88–93 (1971). https://doi.org/10.1295/polymj.2.88
Issue Date:
DOI: https://doi.org/10.1295/polymj.2.88