J. Phys. II France
Volume 2, Numéro 5, May 1992
Page(s) 1045 - 1052
DOI: 10.1051/jp2:1992104
J. Phys. II France 2 (1992) 1045-1052

Static and dynamic properties of a network of wormlike surfactant micelles (cetylpyridinium chlorate in sodium chlorate brine)

J. Appell1, G. Porte1, A. Khatory2, F. Kern2 and S. J. Candau2

1  Groupe de Dynamique des Phases Condensées URA du CNRS n° 233, Université des Sciences et Techniques du Languedoc, 34095 Montpellier Cedex 05, France
2  Laboratoire d'Ultrasons et de Dynamique des Fluides Complexes URA du CNRS n° 851, Université Louis Pasteur, 4 rue Blaise Pascal, 67070 Strasbourg Cedex, France

(Received 4 November 1991, revised 28 January 1992, accepted 10 February 1992)

The structure of solutions of cetylpyridinium chlorate micelles is studied by light scattering and found to be analogous to that of polymer solutions in good solvent and in the semi dilute range. In contrast the micellar solutions are found here to be very fluid and their measured rheological properties are strikingly different from that of polymer solutions. These rheological properties are not accounted for by the recently developed model for semi dilute solutions of equilibrium polymers which described well the properties of other similar wormlike micellar systems. We suggest that the existence of crosslinks rather than entanglement points in the network of wormlike micelles could be responsible for these unexpected properties.

47.15 - 51.20 - 78.35 - 82.70

© Les Editions de Physique 1992