Dresden 2009 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: POSTERS Polymer Physics

CPP 13.34: Poster

Dienstag, 24. März 2009, 14:00–16:30, P3

Characterization of flexible dendrimers by small-angle scattering — •Sabine Rosenfeldt¹, Matthias Ballauff¹, and Ludger Harnau² — ¹Physikalische Chemie I, Universität Bayreuth, Germany — ²MPI für Metallforschung, Universität Stuttgart, Germany

Solutions of flexible dendrimers are investigated up to volume fractions of 0.23, which is a value slightly over the overlapp concentration of the dendrimers. Small-angle neutron scattering and contrast variation were used to determine the radial structure and the interparticular interactions. The experimental structure factors will be used to test the valibility of the decoupling approximation of the total scattering intensity. The data were interpretated using the PRISM integral equation formalism. It is shown that the decoupling approach using the form factor of an undisturbed dendrimer is a good approximation, even for the data in the range of the overlapp concentration.