Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 8: SYMPOSIUM: Polymer networks and beyond: From molecular structure to materials and biological functions III

CPP 8.1: Hauptvortrag

Samstag, 5. März 2005, 14:15–14:45, TU C243

The diffusion of polymers in networks and the importance of network structure — •Mark Geoghegan — Department of Physics and Astronomy, University of Sheffield

The structure of polymer networks has profound implications for their properties. In particular it is not possible to characterise networks by two parameters, as is traditionally done (average number of monomers between crosslinks and volume fraction of network in the preparation state). We consider experimental results (using neutron reflectometry, ion beam profiling, and fluorescence correlation spectroscopy) based at elucidating information on the structure of polymer networks and then describe work investigating the diffusion of homopolymers in dry or solvent swollen polymer networks. Thin film effects will also be discussed, focussing on issues such as the behaviour of sol in networks, as well as the role of interfaces in adhesion.