Berlin 2008 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 34: POSTERS Polymerphysics

CPP 34.30: Poster

Donnerstag, 28. Februar 2008, 17:00–19:30, Poster A

Dielectric and Gas transport Properties of Polymeric Nanocomposites based on Polyhedral Oligomeric Silsesquioxanes — Ning Hao, Martin Böhning, and •Andreas Schönhals — Federal Institute for Materials Research and Testing (BAM), 12205 Berlin, Germany

Polymer based nanocomposites continue to receive tremendous attention for different applications. They show remarkable property improvement (increased tensile properties, decreased gas permeability, decreased solvent uptake, increased thermal stability and flame retardance) when compared to conventionally scaled composites. Different polymer based nanocomposites are prepared where polycarbonate and polystyrene are used as polymer matrices. As molecular nanofiller polyhedral oligomeric silsesquioxanes (POSS) with Phenethyl substituents is used. The property structure relationships of these nanocomposites are investigated by dielectric spectroscopy, gas transport measurements (permeation, sorption) and density measurements as well. The results are discussed with regard to the phase structure of the nanocomposites. This includes the construction of phase diagrams. For the first time a correlation between dielectric and gas transport data are given.