J. Phys. II France
Volume 3, Numéro 5, May 1993
Page(s) 625 - 630
DOI: 10.1051/jp2:1993156
J. Phys. II France 3 (1993) 625-630

Screened hydrodynamic interactions in ternary polymer solutions

Redouane Borsali1, Thomas A. Vilgis2 and Mustapha Benmouna1

1  CERMAV-CNRS and University Joseph Fourier, P.O. Box 53x, F-38041 Grenoble Cedex, France
2  Max-Planck-Institut für Polymerforschung, P.O. Box 3148, D-6500 Mainz, Germany.

(Received 18 November 1992, revised 26 January 1993, accepted 11 February 1993)

This paper discusses the effects of screened hydrodynamic interactions in ternary polymer solutions. The inclusion of a screening length $\xi_{\rm H}$ in the Oseen tensor allows a good description of the wavevector dependence of the relaxation frequencies characterizing the mixture. In the limit of infinite screening length $\xi_{\rm H} \to \infty$, the full hydrodynamic interaction is recovered whereas for infinitely short length $\xi_{\rm H} \to 0$, the Rouse behavior is obtained. The method can be applied to arbitrary mixtures but for simplicity it is presented here in the symmetrical case.

87.15 - 82.70

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