%0 Journal Article
%A Chapartegui, M.
%A Markaide, N.
%A Florez, S.
%A Elizetxea, C.
%A Fernandez, M.
%A Santamaría, A.
%T Specific rheological and electrical features of carbon nanotube dispersions in an epoxy matrix
%D 2010
%@ 0266-3538
%U https://hdl.handle.net/11556/4118
%X The rheological analysis of epoxy pre-polymer/MWCNT dispersions indicates that a physical network is formed. This is destroyed with an imposed shear, giving a viscoplastic and shear thinning behavior. Such destruction is not reflected in dynamic viscoelastic experiments, due to the very rapid recovery of the MWCNT network in the pre-polymer matrix. This responds to the observed lower electrical than rheological percolation threshold. Electrical conductivity results fulfill electron hopping/tunnelling mechanism, which implies a tube-tube distance close to 5. nm. However, rheological percolation requires nanotubes should touch each other, since no polymer chains are implied in the network.
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