Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3323095
Keywords
carbon nanotubes; composite material interfaces; electrical conductivity; percolation; polymers; thermal conductivity
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Funding
- MRSEC program of the National Science Foundation [DMR05-20020]
- NSERC
- Canada Foundation for Innovation
- Atlantic Innovation Fund
- Institute for Research in Materials
- Killam Trusts
- Sumner Foundation
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The thermal conductivity of single-walled carbon nanotube (SWCNT)/polystyrene composites, prepared by a method known to produce a uniform distribution of SWCNT bundles on the micrometer length scale, was measured in the temperature range from approximately 140 to 360 K. The thermal conductivity enhancement (50% for 1 mass % at 300 K) is reasonably constant above room temperature but is reduced at the lower temperatures. This result is consistent with the expected, large contribution of interfacial thermal resistance in SWCNT/polymer composites. Enhancements in electrical conductivity show that 1 mass % loading is in the region of the electrical percolation threshold.
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