Berlin 2008 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: POSTERS Colloids, Nanoparticles and Aggregates
CPP 21.17: Poster
Mittwoch, 27. Februar 2008, 16:00–18:30, Poster A
Structural Anisotropies in Filled Elastomers — •Gerald Johannes Schneider1 and Dietmar Göritz2 — 1Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich — 2Institut für Physik, Universität Regensburg, 93040 Regensburg
Nano composites consisting of an elastomer and a filler such as silica play a major role in our daily life. In general the macroscopic properties of the composite material depend on the type of silica, the filler content, and the silanization, i. e. on the interaction between the surface of the filler and the polymer matrix. Possibly a dependence on the direction of an applied external force can be found. Thus, in order to understand the macroscopic properties an investigation of the filler structure at a length scale of a few nanometers is of great interest. Scattering methods, in particular small angle X-ray scattering experiments are very suitable to study the structure and potential anisotropies of silica at the nanoscale. In our contribution we show the influence of the elastomer, the silane and the filler content on the anisotropy of the silica. We found a systematic increase of the anisotropy with increasing filler content. The influence of the silane is weak and the dependence on the elastomer is negligible.