Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Effect of Multi-walled Carbon Nanotube Dispersion on the Electrical, Morphological and Rheological Properties of Polycarbonate/Multi-walled Carbon Nanotube Composites

  • Han, Mi-Sun (Department of Chemical and Biological Engineering, Korea University) ;
  • Lee, Yun-Kyun (Department of Chemical and Biological Engineering, Korea University) ;
  • Kim, Woo-Nyon (Department of Chemical and Biological Engineering, Korea University) ;
  • Lee, Heon-Sang (Department of Chemical Engineering, Dong-A University) ;
  • Joo, Jin-Soo (Department of Physics, Korea University) ;
  • Park, Min (Hybrid Materials Research Center, Korea Institute of Science and Technology) ;
  • Lee, Hyun-Jung (Hybrid Materials Research Center, Korea Institute of Science and Technology) ;
  • Park, Chong-Rae (Department of Materials Science and Engineering, Seoul National University)
  • Published : 2009.11.25
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Abstract

The effect of a multiwalled carbon nanotube (MWCNT) dispersion on the electrical, morphological and rheological properties of polycarbonate (PC)/MWCNT composites was investigated, with and without pretreating the MWCNTs with hydrogen peroxide oxidation and lyophilization. The resulting PC/treated MWCNT composites showed higher electrical conductivity than the PC/untreated MWCNT composites. The morphological behavior indicated the treated composites to have greater dispersion of MWCNTs in the PC matrix. In addition, the electromagnetic interference shielding efficiency (EMI SE) of the treated composites was higher than that of the untreated ones. Rheological studies of the composites showed that the complex viscosity of the treated composites was higher than the untreated ones due to increased dispersion of the MWCNTs in the PC matrix, which is consistent with the electrical conductivity, EMI SE and morphological studies of the treated composites. The latter results suggested that the increased electrical conductivity and EMI SE of the treated composites were mainly due to the increased dispersion of MWCNTs in the PC matrix.

Keywords

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