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|Type:||Artigo de periódico|
|Title:||Conductivity and Mechanical Properties of Composites Based on MWCNTs and Styrene-Butadiene-Styrene Block (TM) Copolymers|
|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. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 3241-3248, 2009|
|Editor:||John Wiley & Sons Inc|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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