Dresden 2009 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Nanoparticles I

CPP 8.8: Vortrag

Montag, 23. März 2009, 12:15–12:30, ZEU 114

Influence of silicon dioxide nanoparticles on the isothermal cure of a silicone rubber. — •Bartosz Zielinski, Ulrich Müller, Martine Philipp, Jörg Baller, Roland Sanctuary, and Jan Kristian Krüger — LPM, University of Luxembourg, Luxembourg

Incorporation of nanoparticles is nowadays widely used to improve physical and chemical properties of polymer materials. This is mainly caused by the fact that very often the polymer nanocomposites show physical properties not found in the corresponding microstructured material. The justifications for that behaviour are: size- and surface-induced properties of the nanoparticles themselves, topological constrains within the matrix material for high concentrations of nanoparticles and last but not least specific surface interactions between the nanoparticles and the polymer matrix. These chemical and/or physical interactions change the properties of the polymer nanocomposites and result in the creation of the so-called interphases.

Because there are already strong interactions between the single components of the silicone rubber and the nanoparticles which lead to the formation of new structures it will be shown how these interactions influence the curing process of the silicone rubber. We will discuss the influence of the nanoparticles on the optical and thermal properties for a two-component silicone rubber system filled with silicon nanoparticles. The results will be interpreted in terms of particles induced structure formation.

Refractometry and temperature modulated calorimetry have been used as experimental techniques.