Berlin 2012 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: Poster: Nanoparticles and Composite Materials
CPP 8.40: Poster
Monday, March 26, 2012, 17:30–20:00, Poster A
Modified Guest Chains in Dense Polymer Brushes — •Dirk Romeis1,2, Holger Merlitz1,3, and Jens-Uwe Sommer1,2 — 1Leibnitz-Institut für Polymerforschung e.V., 01069 Dresden — 2TU Dresden, Fachbereich Physik, 01062 Dresden — 3Department of Physics and ITPA, Xiamen University, Xiamen 361005, P. R. China
Using a quasi off-lattice self-consistent field approach we systematically study the behavior of modified guest chains in densely grafted polymer brushes. The presented approach accounts for finite extensible chains of spherically shaped monomers and the Carnahan-Starling equation of state for hard spheres is applied. Recent MD simulations [1] found significant conformational instabilities for the guest chains, which could be reproduced in quantitative agreement. A simple analytical model is developed, which confirms the encountered scaling laws for the observed conformational transition.
[1] Merlitz H. et. al. [Macromolecules 41 5070, 2008].