Abstract
Multi-walled carbon nanotubes (MWNTs) pre-treated by concentrated mixed acid or oxidized at high temperature were melt mixed with poly(methyl methacrylate) (PMMA) using a twin screw extruder. The morphologies and electrical properties of the MWNT/PMMA composites were investigated. The thermally treated MWNTs (t-MWNTs) were well dispersed, whereas the acid treated MWNTs (a-MWNTs) were highly entangled, forming large-sized clusters. The resulting electrical properties of the composites were analyzed in terms of the carbon nanotube (CNT) dispersion. The experimental percolation threshold was estimated to be 3 wt% of t-MWNTs, but no percolation occurred at similar concentrations in the a-MWNT composites, due to the poor dispersion in the matrix.
| Original language | English |
|---|---|
| Pages (from-to) | 206-211 |
| Number of pages | 6 |
| Journal | Macromolecular Research |
| Volume | 13 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2005 Jun |
Keywords
- Acid treatment
- CNT/polymer composites
- Carbon nanotubes
- Electrical conductivity
- Melt mixing
- Thermal treatment
ASJC Scopus subject areas
- General Chemical Engineering
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry
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