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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: POSTERS Nanoparticles

CPP 14.2: Poster

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

About the active role of aluminum oxide nanoparticles on network formation in epoxy nanocomposite system: Influence of mixing sequence. — •Bartosz Zielinski, Martine Philipp, Ulrich Müller, Pierre-Colin Gervais, Roland Sanctuary, Jörg Baller, and Jan Kristian Krüger — LPM, University of Luxembourg, Luxembourg

Many properties of polymer nanocomposites can be significantly improved by adding appropriate fillers like nanoparticles. The desired features of the polymer nanocomposites can be achieved by the properties of the nanoparticles themselves and/or by interactions between the polymer matrix and the particles. Due to chemical and/or physical interactions between the nanoparticles and the polymer matrix the properties of the composite are often more affected than predicted, as such interactions lead to the creation of an additional morphology called interphase. The formation of interphases is often in concurrence with the bulk polymerization process. In consequence the mixing sequence of the nanoparticles and the other constituents of the nanocomposite can already have a strong impact on the final properties.

It will be shown that by optical investigations already in the primary suspensions (resin/nanoparticles and hardener/nanoparticles) significantly different properties and therefore different interactions are present. As a matter of fact the different optical properties do not vanish but even increase in the course of polymerization. Accordingly the network formation has to be influenced by the interactions, too.

Refractometry was chosen as experimental technique.