Regensburg 2010 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 18: Interfaces and Thin Films II
CPP 18.9: Talk
Tuesday, March 23, 2010, 16:00–16:15, H39
Cross-linked Polymer Brushes — •Max Hoffmann1,2, Michael Lang1, and Jens-Uwe Sommer1,2 — 1Leibniz-Institut für Polymerforschung Dresden, Hohe Strasse 6, 01069 Dresden, Deutschland — 2Institut für Theoretische Physik, Technische Universität Dresden, 01069 Dresden, Deutschland
Cross-linked polymer brushes have gained increasing attention in recent years. However, up to now there is only little theoretical work done on this topic. Based on simulations of the bond fluctuation model, the cross-linking process will be introduced in detail. The simulation based percolation threshold induced by the cross-links is lower than the percolation threshold which is expected from the mean field gelation model. In order to understand the percolation behavior a new percolation model is developed which we call star-percolation model. As a coarse-grained model the star-percolation model contains core features of the cross-linking process of the polymer brush. Standard properties like the percolation threshold and the cluster size distribution as well as other static and dynamic properties of the cross-linked polymer brushes are discussed.