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-Shaul2 — 1Present 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