Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 13: POSTERS Polymer Physics
CPP 13.23: Poster
Dienstag, 24. März 2009, 14:00–16:30, P3
Polymer-grafted silica nanoparticles: a structural characterization in solution and bulk — •Mathias Meyer1, Eike Hübner1, Wim Pyckhout-Hintzen1, Jürgen Allgaier1, Jörg Stellbrink1, Aurel Radulescu2, Dieter Richter1,2, and Horst Weiss3 — 1Institut für Festkörperforschung, Forschungszentrum Jülich GmbH — 2Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH — 3BASF AG Ludwigshafen
In the framework of an EU FP7 propals with coordination by BASF, nanoparticles basing on organo-modified commercial silica particles of definite size are chemically grafted with PS and PB chains of different length and graft density. They serve as model filler and viscosity modifier if blended with linear matrices. In a combination of SANS, SAXS, DLS and rheology measurements we have characterized the silica nanoparticles with and without grafted polybutadiene and polysyrene in solution and in the blend. The focus of the investigation is on the radial density profile in the various combinations of graft density, chain length and type of the graft as well as the matrix being ideally short-chained i.e. solvent or of intermediate length compared to the grafts. The experiments take profit from the different scattering contrasts and partial labeling. Methods of synthesis i.e. grafting from and grafting to are compared.