Simultaneous Determination of Electrical and Rheological Properties of Polypropylene Filled with Carbon Nanotubes

Composites of isotatic polypropylene (iPP) and carbon nanotubes (CNT) of different concentrations were prepared via an in-situ polymerization using metallocene catalysts. Rheological properties as well as the electrical conductivity were measured simultaneously as a function of CNT-concentration. A...

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Bibliographic Details
Main Authors: Triebel, Christian, Kaschta, Joachim, Katsikis, Nikolaos, Munstedt, Helmut, Funck, Andreas, Kaminsky, Walter
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:Composites of isotatic polypropylene (iPP) and carbon nanotubes (CNT) of different concentrations were prepared via an in-situ polymerization using metallocene catalysts. Rheological properties as well as the electrical conductivity were measured simultaneously as a function of CNT-concentration. A significant effect on the dynamic-mechanical behaviour was found even far below the concentration of the electrical percolation threshold. In addition, the influence of the CNT on the elasticity as measured by the recoverable compliance in shear was determined. In the linear viscoelastic regime a significant increase of the recoverable compliance by adding carbon nanotubes was found. This finding is explained by an interaction between filler and matrix, which hinders the mobility of those matrix molecules being in contact with the CNT. These interactions are not related to the existence of a CNT percolation network as an increase of conductivity is not found simultaneously.
ISSN:0094-243X
DOI:10.1063/1.2964803