Abstract
Dilute dispersions of monodisperse negatively-charged polystyrene latex particles, radii 161 Å, have been examined by time-average light scattering at various latex volume fractions and electrolyte concentrations. The latter were varied from the low value produced by maintaining mixed bed ion-exchange resin beads in the systems (ca. 10−5 mol dm−3) to the value of 5×10−3 mol dm−3 obtained by the addition of sodium chloride. From angular scattering measurements determinations of the structure factors were made; these were produced as a consequence of the particle-particle interactions in the system. By extrapolation of the structure factor to zero scattering angle, values were obtained for the osmotic compressibility and hence the osmotic pressure of the systems as a function of the latex volume fraction. It was found that the experimental data obtained could be interpreted in terms of a hard-sphere model for the particle-particle interaction. Good agreement was obtained provided that the particles were assigned a hard-sphere radius which was determined by the electrostatic repulsion between the particles.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Derjaguin, B. V., L. Landau, Acta Physicochim., U. R. S. S.14, 633 (1941).
Verwey, E. J. W., J. Th. G. Overbeek, Theory of Stability of Lyophobic Colloids, Elsevier (Amsterdam 1948).
Kruyt, H. R., Colloid Science, Vol. 1, Elsevier (Amsterdam 1952).
Ottewill, R. H., Prog. Colloid and Polymer Sci.67, 71 (1980).
Israelachvili, J. N., Faraday Discuss, Chem. Soc.65, 20 (1978).
Brown, J. C., P. N. Pusey, J. W. Goodwin, R. H. Ottewill, J. Phys. A: Gen. Phys.8, 664 (1975).
Brown, J. C., J. W. Goodwin, R. H. Ottewill, P. N. Pusey, Colloid and Interface Science, IV, 59 (1976).
Vrij, A., E. A. Nieuwenhuis, H. M. Fijnaut, W. G. M. Agterof, Faraday Discuss. Chem. Soc.65, 101 (1978).
Vrij, A., J. Chem. Phys.71, 3267 (1979).
van Helden, A. K., A. Vrij, J. Colloid and Interface Science78, 312 (1980).
van den Hul, H. J., J. W. Vanderhoff, Brit. Polym. J.2, 121 (1970).
Goodwin, J. W., R. H. Ottewill, D. E. Yates, J. Colloid and Interface Sci.62, 356 (1977).
Vanderhoff, J. W., Emulsion Polymers and Emulsion Polymerization (American Chemical Society, Washington)165, 61 (1981).
Percus, J. K., G. J. Yevick, Phys. Rev.110, 1 (1958).
Cebula, D. J., R. H. Ottewill, J. Ralston, P. N. Pusey, J. Chem. Soc., Faraday Trans.77, 2585 (1981).
International Critical Tables7, 1 (1930).
Goodwin, J. W., J. Hearn, C. C. Ho, R. H. Ottewill, Colloid and Polymer Sci.252, 464 (1974).
Ghosh, R. E., A Computing Guide for Small-angle Scattering Experiments, 78Gh247T (Institut Laue-Langevin, Grenoble, 1978).
Kerker, M., The Scattering of Light and other Electromagnetic Radiation (Academic Press, New York, 1969).
Ottewill, R. H., H. C. Parreira, J. Physical Chem.62, 912 (1958).
Bateman, J. B., E. J. Weneck, O. C. Eshler, J. Colloid Science14, 308 (1959).
Hearn, J., R. H. Ottewill, J. N. Shaw, Brit. Polym. J.2, 116 (1970).
Hearn, J., M. C. Wilkinson, A. R. Goodall, Adv. in Colloid and Interface Sci.14, 173 (1981).
Ottewill, R. H., P. N. Pusey, R.A. Richardson, to be published.
Ninham, B. W., V. A. Parsegian, J. Theor. Biol.31, 405 (1971).
Healy, T. W., L. R. White, Adv. in Colloid and Interface Sci.9, 303 (1978).
Ashcroft, N. W., J. Lekner, Phys. Rev.45, 33 (1966).
Jeffrey, G. C., R. H. Ottewill, to be published.
Gingell, D., V. A. Parsegian, J. Colloid and Interface Science44, 456 (1973).
Barker, J. A., D. Henderson, J. Chem. Phys.47, 4714 (1967); Ann. Rev. Phys. Chem.23, 439 (1972).
van Megen, W., I. Snook, Chem. Phys. Letters35, 399 (1975).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Ottewill, R.H., Richardson, R.A. Studies of particle-particle interactions using polystyrene latices and time-average light scattering. Colloid & Polymer Sci 260, 708–719 (1982). https://doi.org/10.1007/BF01414658
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01414658