Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 11: POSTER Disperse Polymer Systems
CPP 11.8: Poster
Dienstag, 28. März 2006, 17:00–19:00, P3
Aggregation of block copolymers and surfactants studied by fluorescence correlation spectroscopy. — •H. Zettl1, M. Ruppel2, M. Burkhardt2, A.H.E. Müller2, and G. Krausch1 — 1Physikalische Chemie II, Universität Bayreuth, 95440 Bayreuth — 2Makromolekulare Chemie II, Universität Bayreuth, 95440 Bayreuth
In recent years new block copolymers with very low critical aggregation concentrations (cac) have been synthesized. With classical techniques like light scattering and conductivity the exact determination of these cac’s becomes increasingly difficult. Fluorescence correlation spectroscopy (FCS) allows to analyse the diffusion behaviour of single dye molecules to study the aggregation processes of polymers and low molecular weight surfactants. We show aggregation studies starting from well investigated surfactant systems up to complex block copolymers in aqueous solutions and organic solvents.