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CPP: Chemische Physik und Polymerphysik
CPP 13: POSTER New Experimental Techniques
CPP 13.5: Poster
Tuesday, March 28, 2006, 17:00–19:00, P3
Dynamic Structure Factor of Different Systems of Polymers — •Michael Strauch and Ekkehard Straube — Martin-Luther-Universität Halle-Wittenberg, Fachbereich Physik, Fachgruppe Theoretische Physik, Von-Seckendorff-Platz 1, D-06120 Halle (Saale)
In this poster we present our investigations concerning the dynamic structure factor Sq(t) in different systems of polymer chains.
In a first step, we have calculated the dynamic structure factor for a chain with randomly distributed friction coefficients ξi and spring constants ki, thus generalising the result of the well-known Rouse model. In the more general case, the analysis can only be done numerically.
Furthermore, we have considered a network of polymer chains. In this case, one expects a finite value of Sq(t) for large times because the correlations between the chain segments do not completely vanish.
Finally, we compare our results with those of de Gennes where the chain dynamics are basically described as a purely longitudinal diffusion along the chain.