Regensburg 2010 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: Poster: Elastomers and Gels

CPP 34.4: Poster

Mittwoch, 24. März 2010, 17:30–19:00, Poster C

Simulating coarse grained filled rubber networks under shear stress — •Fan Zhang, Nils Hojdis, and Reinhard Hentschke — Fachbereich Mathematik und Naturwissenschaften, Bergische Universität, Gauss-Str. 20, 42097 Wuppertal

A simple model for filled rubber networks is studied via stochastic dynamics simulation. The model consists of different types of masses joined via simple short-ranged potentials. One type of mass represents filler particles, whereas a second type represents equivalent rubber volume elements. The filler-filler, rubber-rubber, and filler-rubber interaction potentials may be designed according to the (statistical) mechanical properties of the different interfaces. In this exploratory study the potentials simply are harmonic and merely distinguished by different force constants. A harmonic shear stress is imposed via boundary conditions due to Lees and Edwards. Our results include tan δ vs. temperature for different force constant combinations, shear frequencies, and amplitudes. The mapping of the model onto real materials is discussed.