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Type: Artigo de periódico
Title: Conductivity And Mechanical Properties Of Composites Based On Mwcnts And Styrene-butadiene-styrene Block™ Copolymers
Author: Pedroni L.G.
Soto-Oviedo M.A.
Rosolen J.M.
Felisberti M.I.
Nogueira A.F.
Abstract: Composites based on multiwall carbon nanotubes (MWCNTs) and the block copolymer styrene-butadiene-styrene with two different contents of styrene have been investigated and their electrical conductivity and mechanical properties have been evaluated. The composites were prepared by a solution casting procedure, using a dispersant agent for the MWCNTs. Conductivity values of 10-4 and 1.6 S cm-1 have been obtained for samples containing 1 and 12 wt % of MWCNTs, respectively. The percolation threshold achieved for these systems was ~0.25 wt %. According to dynamic mechanical analysis, the MWCNTs interact with both phases of the copolymers, acting as a reinforcement filler, whereas the dispersant agent acts as a plasticizer. However, it was shown that the reinforcing effect of the MWCNTs overcomes the latter, resulting in an overall improvement of mechanical properties of the composites. © 2009 Wiley Periodicals, Inc.
Rights: fechado
Identifier DOI: 10.1002/app.29897
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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