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Type: Artigo de periódico
Title: Nanocomposites based on MWCNT and styrene-butadiene-styrene block copolymers: Effect of the preparation method on dispersion and polymer-filler interactions
Author: Pedroni, LG
Araujo, JR
Felisberti, MI
Nogueira, AF
Abstract: Composites of Kraton-D (R) 1102 BT (a styrene-butadiene-styrene block copolymer) and multi-walled carbon nanotubes (MWCNTs) were prepared by melt mixing. The composites were characterized by electrical conductivity measurements (Coleman's method), mechanical properties (DMA and stress-strain tests), thermal stability (thermogravimetry) and morphology of dispersion (SEM). Finally, the resulting composites were compared with those made by the solution casting method. The results showed a strong influence of the preparation methodology on the final properties of the composites due to changes in morphology. Composites prepared by casting showed a higher electrical conductivity than extruded ones; the composites with 6 wt.% of MWCNT prepared by extrusion presented conductivity of the same order of magnitude as the composite with 1 wt.% of MWCNT prepared by casting - 10(-3) to 10(-4) S cm(-1). However, the extruded samples presented better mechanical properties than the casting ones. (C) 2012 Elsevier Ltd. All rights reserved.
Subject: Carbon nanotubes
Electrical properties
Mechanical properties
Country: Inglaterra
Editor: Elsevier Sci Ltd
Citation: Composites Science And Technology. Elsevier Sci Ltd, v. 72, n. 13, n. 1487, n. 1492, 2012.
Rights: fechado
Identifier DOI: 10.1016/j.compscitech.2012.06.009
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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