Dresden 2006 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 11: POSTER Disperse Polymer Systems
CPP 11.2: Poster
Tuesday, March 28, 2006, 17:00–19:00, P3
Clay Dispersions — •Henrich Frielinghaus1, Helen Hermes2, Wim Pyckhout-Hintzen1, and Dieter Richter1 — 1Forschungszentrum Jülich GmbH, Institut für Festkörperforschung, 52425 Jülich, Germany — 2Physik der weichen Materie, IPkM, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
Dispersions of montmorillonite clay particles in water are investigated by small angle neutron scattering. This method measures structures in the range of several 10Å up to several 1000Å. Complementary x-ray scattering experiments at intermediate angles complete the structural studies at shorter distances. Many dispersions showed a small fraction of tactoids, i.e. stacks of single platelets. A new developed model for small angle neutron scattering successfully describes the disc-like behaviour of the single platelets coexisting with a small fraction of tactoids. This model is about to be applied also for polymer-clay nanocomposites, since the distribution function of the stacking can be varied.