Regensburg 2010 – wissenschaftliches Programm

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SYMR: Symposium Nuclear Magnetic Resonance: from Applications in Condensed-Matter Physics to New Frontiers

SYMR 6: Polymer Dynamics

SYMR 6.10: Vortrag

Mittwoch, 24. März 2010, 12:30–12:45, H48

Dynamics of semiflexible treelike polymeric networks — •Maxim Dolgushev and Alexander Blumen — Theoretische Polymerphysik, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg, Deutschland

Extending the generalized Gaussian structure model[1] we study the dynamics of treelike networks, in which we include stiffness using mean-field restrictions on the bonds' orientations. We proceed by using the Bixon-Zwanzig-model[2] and also the maximum entropy principle[3]. For semiflexible treelike networks both approaches turn out to be equivalent[4]. The dynamics of semiflexible treelike polymers obeys Langevin equations, which we succeeded in deriving analytically[4]. This allows us to determine straightforwardly the dynamical characteristics relevant to mechanical and dielectric relaxation[4,5].

[1] A. A. Gurtovenko and A. Blumen, Adv. Polym. Sci., 182, 171 (2005).

[2] M. Bixon and R. Zwanzig, J. Chem. Phys., 68, 1896 (1978).

[3] R. G. Winkler, L. Harnau, P. Reineker, J. Chem. Phys., 101, 8119 (1994).

[4] M. Dolgushev and A. Blumen, J. Chem. Phys., 131, 044905 (2009).

[5] M. Dolgushev and A. Blumen, Macromolecules, 42, 5378 (2009).