Dresden 2009 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 13: POSTERS Polymer Physics
CPP 13.34: Poster
Tuesday, March 24, 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.