Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session 2
CPP 37.32: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P3
On the Dynamics of Polymer Brushes — •Michael Lang1, Ron Dockhorn1,2, Marco Werner1,2, Torsten Kreer1, and Jens-Uwe Sommer1,2 — 1Leibniz Institute of Polymer Research Dresden, Hohe Straße 6, 01069 Dresden, Germany. — 2Institute of Theoretical Physics, Technische Universität Dresden, Zellescher Weg 17, 01062 Dresden, Germany
We analyze the relaxation dynamics of densely grafted layers of polymer chains under good solvent conditions by Monte Carlo simulations. We find anisotropic monomer mean square displacements when comparing the directions parallel and perpendicular to the grafting plane at intermediate time scales. Our analysis further reveals that the chains relax from the free end towards the innermost monomers. A plateau is observed for the bond-autocorrelation function that grows exponentially in time for the innermost monomers of the brush. Our observations indicate that chain retraction might be the dominating mechanism for the long time relaxation of densely grafted chains.