Conductivity and mechanical properties of composites based on MWCNTs and styrene-butadiene-styrene blockTM copolymers

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...

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Published inJournal of applied polymer science Vol. 112; no. 6; pp. 3241 - 3248
Main Authors Pedroni, Lucas G, Soto-Oviedo, Mauro A, Rosolen, J Mauricio, Felisberti, Maria I, Nogueira, Ana F
Format Journal Article
LanguageEnglish
Published 15.06.2009
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Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0021-8995
1097-4628
DOI:10.1002/app.29897