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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: POSTERS Polymer Physics

CPP 13.29: Poster

Dienstag, 24. März 2009, 14:00–16:30, P3

Structural relaxation process in epoxy nanocomposites as seen by mechanical and dielectric spectroscopy — •Matthieu Thomassey, Jörg Baller, Markus Ziehmer, Bartosz Zielinski, Martine Philipp, Ulrich Müller, Jan Kristian Krüger, and Roland Sanctuary — Université du Luxembourg, Laboratory of Physics of Condensed Matter and Advanced Materials (LPM), 162a, avenue de la Faïencerie, L-1511 Luxembourg

Epoxy resins based on diglycidyl ether of bisphenol A (DGEBA) are thermal glass formers with glass transition temperatures of about 250 K. Incorporation of inorganic nanoparticles into these oligomer matrices take influence on their thermal glass transition behaviour. Depending on the interaction between epoxy resin oligomers and nanoparticles the structural relaxation process which is made responsible for the glass transition can be changed. Mechanical and dielectric spectroscopy is used to study the structural relaxation process in two types of nanocomposites: DGEBA filled with silica and alumina nanoparticles. These investigations which are also supported by measurements of the complex specific heat capacity indirectly elucidate the molecular interaction between nanoparticles and oligomer matrix.