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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
Author: Pedroni, LG
Soto-Oviedo, MA
Rosolen, JM
Felisberti, MI
Nogueira, AF
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
Subject: nanocomposites
block copolymers
Country: EUA
Editor: John Wiley & Sons Inc
Citation: Journal Of Applied Polymer Science. John Wiley & Sons Inc, v. 112, n. 6, n. 3241, n. 3248, 2009.
Rights: fechado
Identifier DOI: 10.1002/app.29897
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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