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In situ Lubrication Dispersion of Multi-Walled Carbon Nanotubes in Poly(propylene) Melts
- Issue Date
- Mar-2012
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- CNT nanocomposites; dispersions; multi-walled carbon nanotubes; poly(propylene); rheology
- Citation
- MACROMOLECULAR MATERIALS AND ENGINEERING, v.297, no.3, pp.279 - 287
- Journal Title
- MACROMOLECULAR MATERIALS AND ENGINEERING
- Volume
- 297
- Number
- 3
- Start Page
- 279
- End Page
- 287
- ISSN
- 1438-7492
- Abstract
- An in situ lubrication dispersion method is developed to achieve electrical conductivity in PP containing a small amount of MWCNTs. Good dispersion of the MWCNTs in PP is observed even after a short mixing time because the interactions between the entangled nanotubes are reduced. By in situ lubrication dispersion, the electrical percolation threshold of the PP nanocomposite can be as low as 0.50.7?wt% MWCNT. Rheological data also support percolation at 0.5?wt% MWCNT. With 0.5?wt% MWCNT, the slope of G' at low frequency approaches unity and shows non-terminal behavior. The proposed dispersion method enhances the wetting of MWCNTs and improves MWCNT dispersion compared to both direct mixing of MWCNT powder with a polymer melt and conventional master batch dilution.
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