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Thermal properties of multi-walled carbon nanotube-reinforced polypropylene composites

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1 Author(s)
Sok Won Kim ; Dept. of Phys., Ulsan Univ., South Korea

The thermal conductivity and thermal diffusivity of chemically surface treated multi-walled carbon nanotube (MWCNT) reinforced poly-propylene (PP) composites were measured using 3ω method in 90-320 K and photoacoustic (PA) spectroscopy at room temperature, respectively. Nine kinds of samples were prepared by the melt-blending of PP resins with the addition of 0.1, 0.5, and 2.0 wt% of not treated, nitric acid (HNO3) treated, and potassium hydroxide (KOH) treated nanotube contents, and compression-molded at 180°C into about 0.5 mm thickness composite films using the hot-press. The thermal conductivity was in the range between 0.05 to 0.6 W·m-·K-1 and increases as the temperature increases and the CNT concentration increases. By the chemical treatment, the thermal conductivity of 0.5 and 2.0 wt% samples were enhanced about 2 times, however the sample of 0.1 wt% didn't changed. These can be explained qualitatively by the effects of chemical treatment on reinforcing ability for CNTs/polymer composites.

Published in:

Proceedings. The 9th Russian-Korean International Symposium on Science and Technology, 2005. KORUS 2005.

Date of Conference:

26 June-2 July 2005