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Transport behavior of PMMA/expanded graphite nanocomposites

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TextSeries: ; Polymer, 43(25), p.6767-6773, 2002Contained works:

Zheng, W
Wong, S.C
Sue, H.J

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Abstract: Polymethylmethacrylate (PMMA)/expanded graphite (EG)and PMMA/untreated graphite (UG)composites were prepared by direct solution blending of PMMA with EG and UG fillers. A four-point resistivity probe system was used to measure the electrical conductivity of the composites. With the increase of filler content, the electrical conductivity of the composites showed the transition from an insulator to a semiconductor. The transition can be described by classic percolation theory with a critical exponent of 2.1±0.1 for PMMA/EG and 1.8±0.1 for PMMA/UG composites. Interestingly, only 0.6 vol

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Polymethylmethacrylate (PMMA)/expanded graphite (EG)and PMMA/untreated graphite (UG)composites were prepared by direct solution blending of PMMA with EG and UG fillers. A four-point resistivity probe system was used to measure the electrical conductivity of the composites. With the increase of filler content, the electrical conductivity of the composites showed the transition from an insulator to a semiconductor. The transition can be described by classic percolation theory with a critical exponent of 2.1±0.1 for PMMA/EG and 1.8±0.1 for PMMA/UG composites. Interestingly, only 0.6 vol

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