Regensburg 2007 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: POSTER: Colloids and Nanoparticles
CPP 9.21: Poster
Montag, 26. März 2007, 16:00–18:00, Poster B
Downsizing of Silica — •Tobias Pöpperl1, Gerald Johannes Schneider1, Matthias Kellermeier2, Regina Klein2, and Dietmar Göritz1 — 1Institut für Physik, Universität Regensburg, 93040 Regensburg — 2Institut für Physikalische und Theoretische Chemie, Universität Regensburg, 93040 Regensburg
The mechanical properties of elastomers can be influenced to a large extent by introducing different additives - like the active filler silica. Due to the mixing procedure, changes in the filler morphology can occur - for example downsizing of silica clusters. On the other hand, some properties of the elastomer may be independent of the additive itself, but linked to specific properties of the polymer chains that are relevant for the restructuring process. However, it is not possible to examine both of these influences entirely indepenent of each other.
To learn more about changes in silica morphology, we studied grinded plain silica. For grinding we used a centrifugal force ball mill and repeatedly extracted samples with advancing grinding time. To investigate the structure development in the so obtained samples we used Small Angle X-ray Scattering (SAXS) and Ultra Small Angle X-ray Scattering (USAXS).