Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: Poster: Interfaces and Thin Films (joint session with DECHEMA and VDI)
CPP 9.4: Poster
Montag, 11. März 2013, 17:30–19:30, Poster C
Investigation of critical parameters of polymer adsorption for chains with different architecture — •Olga Mironova1,2 and Jens-Uwe Sommer1,2 — 1Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany — 2TUD, Dresden, Germany
In order to understand the role of polymer chain architecture on adsorption properties, we used scaling arguments to analyze polymer systems. We suggest that molecules with the same molecular weight but with different structure can have different adsorption properties, such as critical energy of adsorption and crossover exponent. For such polymers this difference can be applied as basis in separation technique like Liquid Chromatography at Critical Condition. For computer simulation of polymer systems we used the Bond-Fluctuation Model (BFM). End-grafted polymers at an adsorbing surface are considered under good solvent conditions. We compared three types of polymer architecture: linear, star-shaped and hyper-branched. It was found that critical parameters for 4-arm star-shaped and linear polymers are very close to each other. We also studied competitive adsorption from a dilute solution containing a mixture of stars and linear polymers. For hyper-branched polymers we realized essential ensemble averages over many realizations of branching topology.