Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: Poster: Nanoparticles and Composite Materials

CPP 12.7: Poster

Montag, 11. März 2013, 17:30–19:30, Poster C

Thermal and mechanical properties of styrene butadiene rubber/alumina nanocomposites — •Rymma Sushko, Jörg Baller, Marlena Filimon, and Roland Sanctuary — Laboratory for the Physics of Advanced Materials, University of Luxembourg, 162a avenue de la Faiencerie, L-1511, Luxembourg

SBR is a rubber material with high technical relevance. In order to enhance the mechanical properties of the rubber we dispersed inorganic nanoparticles in the polymer matrix. By doing so, the properties of a given composite can be tuned either by changing the nanoparticle concentration or by modifying the surface properties of the fillers. Both interventions have indeed the potential to take influence on the structure and properties of the interphases emerging between the fillers and the polymer matrix. In this contribution we report on the glass transition behavior of SBR/alumina nanocomposites when the concentration and surface properties of the alumina nanoparticles are changed. We also discuss the influence of the fillers on the shear stiffness of the rubber material. The samples were investigated by TMDSC and DMA methods. TMDSC investigations shed light on a surprising behavior of the glass transition temperature when the nanoparticle concentration is changed: at low filler contents the glass transition temperature Tg passes through a minimum. While further increasing the nanoparticle content Tg increases to finally saturate at high concentrations. One of the main DMA results is that increasing of the alumina concentration induces a quasi-solid-like frequency-independent response of the nanocomposites in the low frequency regime.