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CPP: Chemische Physik und Polymerphysik

CPP 18: Poster: Polymer Blends, Heterogeneous Systems, Colloids and Nanoparticles, Interfaces, Polyelectrolytes

CPP 18.28: Poster

Mittwoch, 4. April 2001, 12:30–15:00, AT1

Adsorption Behavior of Homo- and Blockcopolymers — •Susanne Metzger¹, Jörg Baschnagel², Marcus Müller¹, and Kurt Binder¹ — ¹Institut für Physik, Johannes Gutenberg Universiät, 55099 Mainz, Germany — ²Institut Charles Sadron, 6 rue Boussingault, F-67083Strasbourg, France

We investigate the adsorption behavior of blockcopolymers onto flat walls from good solutions. This study is performed by Monte Carlo simulations of a continuum model, using modern methods, such as Configurational Bias Monte Carlo or extended ensemble techniques. The monomer-wall interaction is modeled by a long range 9-3 Lennard-Jones potential to mimic the behavior of real systems as realistically as possible. As preliminary step we investigate the adsorption of a single homopolymer with N≤ 512 monomers. Our first results indicate that the crossover exponent ϕ is distinctly smaller than originally suggested, i.e. ϕ < 0.59. This finding is supported by recent theoretical work and lattice siumlations.