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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 54: Poster Session 3

CPP 54.5: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Segmental Mobilities in Polymer Films — •Diddo Diddens¹, Andreas Heuer², Jörg Baschnagel¹, and Hendrik Meyer¹ — ¹Institut Charles Sadron, Université de Strasbourg, 23 Rue du Loess, 67034 Strasbourg, France — ²Institut für physikalische Chemie, Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany

The dynamical properties of polymer chains in thin films as compared to their counterparts in the bulk are of special interest for both practical applications as well as theoretical considerations. Here, we study the local segmental motion in polymer films on the basis of MD simulation data. In particular, we focus on the mobility of a given segment in dependence of its position within the film (i.e. in the center or close to the interface). This is done by our recently developed method [1], which utilizes the Langevin equation to interpret specific averages of the segmental motion in order to yield an effective mobility. Since this approach is purely local, it also allows the extraction of segmental mobilities for polymer chains in confined geometries, thus contrasting the non-local Rouse mode analysis. Additional emphasis is put on the effect of the interface (either a solid wall or vacuum) on the segmental motion.

[1] D. Diddens, M. Brodeck, A. Heuer, EPL 91 (2010) 66005