Regensburg 2002 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 13: Poster: Funktionalisierte Polymere

CPP 13.6: Poster

Mittwoch, 13. März 2002, 16:30–18:00, B

Concentration dependent behavior of reversibly assembled polymers in a dense solution — •Peter Lenz and Reinhard Hentschke — Physics Department and Institute for Materials Science, Wuppertal University, Gauss-Strasse 20, 42097 Wuppertal, Germany

The lyotropic liquid crystalline phase behavior of a reversibly assembling system is investigated via computer simulation. We report results of molecular dynamics studies for high concentrations of the self-assembling monomers forming linear aggregates between 0.25 and 0.75 solute weight fraction using an anisotropic Lennard-Jones-type model. A comparison of the calculated mean aggregation number with experimental results of a liquid crystalline polymer system reveals a similar concentration dependence, which is not explained by the commonly used hard-core excluded volume theories. In addition we study the influence of various important interaction parameters on the aggregation behavior as well as on the relevant order parameters.