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Point de vue : Some issues in rubber nanocomposites : new opportunities for silicone materials

This paper focuses on some issues regarding rubber nanocomposites especially silicone rubbers. An outstanding affinity of carbon nanotubes towards poly(dimethylsiloxane) (PDMS) has been observed. The reinforcing effect of carbon nanotubes is much more important than that imparted by in situ generated silica particles well known to lead to significant improvement in the mechanical properties of the elastomeric matrix.The high aspect ratio of carbon nanotubes allows the formation of a conductive interconnecting filler network at a very small loading (0.05 phr). This result, which is the lowest reported electrical percolation threshold in an elastomer composite, is only possible with well dispersed carbon nanotubes that have good adhesion with the polymer chains. That opens the way to various industrial applications of carbon nanotubes as conductive paints, coatings or adhesives where low loadings are required to achieve electrical conductivity without compromising physical properties of the host polymeric medium.
Volume resistivity against nanotubes loading of PDMS composites
Volume resistivity against nanotubes loading of PDMS composites

Liliane Bokobza Publié dans Silicon, 1,141,2009.