Conductivity and Mechanical Properties of Composites Based on MWCNTs and Styrene-Butadiene-Styrene Block™ Copolymers

被引：45

作者：

Pedroni, Lucas G. ^{[1
]}

Soto-Oviedo, Mauro A. ^{[1
]}

Rosolen, J. Mauricio ^{[2
]}

Felisberti, Maria I. ^{[1
]}

Nogueira, Ana F. ^{[1
]}

机构：

[1] Univ Estadual Campinas, Inst Quim, BR-13084971 Campinas, SP, Brazil

[2] USP, Inst Quim, BR-14040901 Ribeirao Preto, SP, Brazil

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2009年 / 112卷 / 06期

关键词：

nanocomposites; block copolymers; elastomers; MULTIWALLED CARBON NANOTUBES; LOW PERCOLATION-THRESHOLD; POLYMER NANOCOMPOSITES; EPOXY COMPOSITES; FIELD-EMISSION; ELASTOMER; MORPHOLOGY; POLYANILINE; DISPERSION; ACTUATORS;

D O I：

10.1002/app.29897

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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

引用

页码：3241 / 3248

页数：8

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