Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 13: POSTERS Polymer Physics
CPP 13.31: Poster
Dienstag, 24. März 2009, 14:00–16:30, P3
The influence of silica nano fillers on the structure and dynamics of linear polymer melts — Klaus Nusser1,2, •Gerald Johannes Schneider1,2, Wim Pyckhout-Hintzen1, Lutz Willner1, and Dieter Richter1 — 1IFF, Forschungszentrum Jülich GmbH, Leo-Brandt-Str., 52425 Jülich — 2Jülich Centre for Neutron Science at FRM2, Lichtenbergstr. 1, 85747 Garching bei München
Elastomer-filler composite materials are technically very important and widely used. In particular, the reinforcing effect achieved by the addition of fillers like silica into a polymer matrix is commonly used to tune macroscopic properties like the elastic modulus of the composite material. In order to get new insight into the microscopic mechanisms of reinforcement, a blend material consisting of a linear polymer (Polyethylene-propylene, polyisoprene and polydimethylsiloxane) and hydrophobized silica was investigated. A study of the rheology of the material in dependence of the filler volume percentage was performed. Moreover Small Angle Neutron Scattering and Neutron Spin Echo experiments were performed in order to get insight into the microscopic structure and dynamics of the systems. In particular, the constraints on the polymer dynamics imposed by the presence of the silica particles were investigated for different filler degrees.