Specific rheological and electrical features of carbon nanotube dispersions in an epoxy matrix

被引：55

作者：

Chapartegui, M. ^{[1
]}

Markaide, N. ^{[1
]}

Florez, S. ^{[1
]}

Elizetxea, C. ^{[1
]}

Fernandez, M. ^{[2
,3
]}

Santamaria, A. ^{[2
,3
]}

机构：

[1] Inasmet, Tecnalia, Dept Mfg Proc Plast & Composites, E-20009 San Sebastian, Spain

[2] Univ Basque Country, Fac Chem, Dept Polymer Sci & Technol, E-20080 San Sebastian, Spain

[3] Univ Basque Country, Fac Chem, Polymat Inst, E-20080 San Sebastian, Spain

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2010年 / 70卷 / 05期

关键词：

Nanocomposites; Epoxy; Carbon nanotubes; Rheology; Electrical properties; CONDUCTIVE NETWORK FORMATION; PERCOLATION THRESHOLDS; POLYMER NANOCOMPOSITES; DYNAMIC PERCOLATION; COMPOSITES; MELT; BEHAVIOR;

D O I：

10.1016/j.compscitech.2010.02.008

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The rheological analysis of epoxy pre-polymer/MWCNT dispersions indicates that a physical network is formed This is destroyed with an imposed shear, giving a viscoplastic and shear thinning behavior Such destruction is not reflected in dynamic viscoelastic experiments, due to the very rapid recovery of the MWCNT network in the pre-polymer matrix. This responds to the observed lower electrical than theological percolation threshold Electrical conductivity results fulfill electron hopping/tunnelling mechanism, which implies a tube-tube distance close to 5 nm However, theological percolation requires nanotubes should touch each other, since no polymer chains are implied in the network (C) 2010 Elsevier Ltd All rights reserved

引用

页码：879 / 884

页数：6

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