Specific rheological and electrical features of carbon nanotube dispersions in an epoxy matrix |
| |
| Authors: | M. Chapartegui,N. Markaide,S. Florez,C. Elizetxea,M. Fernandez,A. Santamarí a |
| |
| Affiliation: | 1. Inasmet, Tecnalia, Department of Manufacturing Processes of Plastics and Composites, Paseo Mikeletegi 2, E-20009 San Sebastian, Spain;2. Department of Polymer Science and Technology and Polymat Institute, Faculty of Chemistry, University of the Basque Country, P.O. Box 1072, E-20080 San Sebastian, Spain |
| |
| Abstract: | 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 rheological percolation threshold. Electrical conductivity results fulfill electron hopping/tunnelling mechanism, which implies a tube–tube distance close to 5 nm. However, rheological percolation requires nanotubes should touch each other, since no polymer chains are implied in the network. |
| |
| Keywords: | A. Nanocomposites Epoxy A. Carbon nanotubes D. Rheology B. Electrical properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
