Berlin 2008 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: POSTERS Colloids, Nanoparticles and Aggregates
CPP 21.10: Poster
Wednesday, February 27, 2008, 16:00–18:30, Poster A
The influence of nano fillers on the dynamics of a PEP-Silsesquioxane composite - a NSE study — •Klaus Nusser1, Gerald Johannes Schneider2, Wim Pyckhout-Hintzen2, Andreas Wischnewski2, Lutz Willner2, and Dieter Richter2 — 1Institut für Physik, Universität Regensburg, 93040 Regensburg — 2Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich
Elastomer-filler composite materials are technically very important and widely used, because the addition of active fillers to the polymers significantly enhances the properties of the resulting blend material and helps to optimize its employment in distinct applications. Up to now mainly a reinforcing effect of the filler was observed. New results by Mackay et al., however, report a decrease in viscosity by the addition of nano-particles of a characteristic size. The impact of this effect is investigated by means of a mixture of polyethylene-propylene (PEP) with silsesquioxane. The silsesquioxan nano particles have a characteristic diameter, which can very well be compared to the tube diameter of the PEP melt within the reptation model. The changes of the dynamics after the addition of this nano-filler are investigated and supposed to give more insight into the mechanisms of interaction in polymer-filler nano composites. First results from neutron spin echo measurements at the ILL are presented.