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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: POSTER: Polymer Physics

CPP 8.8: Poster

Montag, 26. März 2007, 16:00–18:00, Poster B

Rouse Dynamics in a Random Medium — •Michael Strauch and Ekkehard Straube — Martin-Luther-Universität Halle-Wittenberg, Institut für Physik, D-06099 Halle (Saale), Germany

We have studied the dynamics of a Rouse chain with randomly distributed segmental mobilities and were able to calculate the dynamic structure factor rigorously.

Introducing a time step opens up the possibility to extend this model so that the description of the motion of polymer chains inside random media becomes possible. The (randomly distributed) mobilities are no longer constant. Rather, the average mean square displacement (MSD) of the segments between two consecutive time steps is taken as a measure for the mean free path length. After comparing each segment’s individual MSD (between consecutive time steps) with this mean free path length a decision is made whether this segment’s mobility is altered (because it has moved a sufficient distance within the medium) or not (because it is still in the vicinity of its previous position).

In our poster we present results from our numerical simulations and compare them with experimental data.