Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 13: Poster: Interfaces and Thin Films
CPP 13.1: Poster
Dienstag, 27. März 2012, 18:15–20:45, Poster A
Critical Adsorption of Polymers with Different Architecture — •Olga Mironova1 and Jens-Uwe Sommer1,2 — 1Leibniz-Institut für Polymerforschung Dresden e. V., Dresden, Germany — 2TUD, Dresden, Germany
In order to understand the role of the chain architecture for the adsorption properties of polymers, we simulate polymer systems using the bond-fluctuation model (BFM). End-grafted polymers at an adsorbing surface are considered under good solvent conditions and we analyzed our results using scaling arguments. Suggestion, that adsorption properties of polymers, such as critical energy of adsorption and crossover exponent, for instance, can differ between molecules with the same molecular weight, but with different architectures, can be used as basis in separation technique (Liquid chromatography at the critical condition-mass spectrometry) of such molecules. We consider molecules with three different types of architecture: linear, star-shaped and hyperbranched. It was found that critical parameters for 4-arms star-shaped polymers and linear chains are very close to each other. To determine the critical parameters for hyperbranched polymers ensemble averages over many realizations of the branching topology is necessary. Variations of the branching probability gives access to experiments on hyperbranched polymers.