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Bayreuth 1998 – wissenschaftliches Programm

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PO: Polymerphysik

PO 4: Poster: Molekulare Dynamik

PO 4.15: Poster

Mittwoch, 11. März 1998, 15:25–17:15, P1

Junction dynamics and rheology of model wormlike micelles — •M. Kröger1,2 and A. Ben-Shaul21Present address: Institut für Polymere, Polymer Physics, ETH Zürich, CH-8092 Zürich, Switzerland — 2Fritz Haber Center for Molecular Dynamics, The Hebrew University of Jerusalem, Israel


Recent molecular-level calculations suggest that, in equilibrium, branching of a living wormlike micelles in dilute solutions is, generally, energetically unfavorable [1]. Nevertheless micellar junction formation may be (entropically) favorable at higher concentrations due to excluded volume interactions and/or under nonequilibrium (flow) conditions. We study the dynamics and lifetime of junctions in wormlike micellar systems both theoretically and by nonequilibrium molecular dynamics simulations by extending methods developed in [2,3].

[1] S. May, Y. Bohbot and A. Ben-Shaul, Molecular theory of bending elasticity and branching of cylindrical micelles, submitted 1997

[2] M. Kröger and R. Makhloufi, Phys. Rev. E 53 (1996) 2531

[3] W. Carl, R. Makhloufi and M. Kröger, J. Phys. France II 7 (1997) 931

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