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Conductive polymer composites

(Nano-) Composites and Blends



M.Sc. Xianhu Liu


Tel.: +49 9131/85-27746

Fax: +49 (0) 9131 85 - 28321


Room: 1.90

The electrical conductivity of insulating polymers can be increased by incorporation of conductive fillers considerably. The conductive polymer composites (CPC) are used as antistatic packaging materials or as materials for electromagnetic shielding. Moreover, nowadays the development of novel sensors based on CPC for "intelligent textiles" is of great scientific and also economical interest. The electrical properties of CPC are governed by conductive structures made of filler particles in an insulating polymer matrix. Properties of these structures and their formation are influenced not only by the properties of the polymer and filler or composite composition but also by the conditions of processing which occurs almost exclusively in the molten state.


The goal of the research project is to understand and describe the behaviour of conductive particle structures under defined mechanical deformations in shear and elongational flow. Therefore, simoultaneous electrical and rheological measurements are used as a sensitive tool to follow the changes in particle structures induced by mechanical deformation. Besides the evaluation of the effects of different flow fields on the behaviour of particle structures, the influences of filler and polymer matrix properties are investigated. Furthermore, the rheology of the composites is studied thoroughly to obtain information about behaviour of filled systems during the melt processing.