High Electric Conductive PMMA Composites without Impact Value Decay by Dispersion of Copper Powder

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  • Nishi Yoshitake
    Department of Metallurgical Engineering, Graduate School of Engineering, Tokai University Laboratoire de Génie Electrique et Ferroélectricité (LGEF), Institut National des Sciences Appliquées de Lyon (INSA Lyon) School of Science and Technology, Tokai University
  • Ebihara Yoshihide
    Department of Metallurgical Engineering, Graduate School of Engineering, Tokai University
  • Kunikyoh Nobuhiro
    Department of Metallurgical Engineering, Graduate School of Engineering, Tokai University
  • Kanda Masae
    Department of Metallurgical Engineering, Graduate School of Engineering, Tokai University Laboratoire de Génie Electrique et Ferroélectricité (LGEF), Institut National des Sciences Appliquées de Lyon (INSA Lyon)
  • Iwata Keisuke
    School of Science and Technology, Tokai University
  • Yuse Kaori
    Laboratoire de Génie Electrique et Ferroélectricité (LGEF), Institut National des Sciences Appliquées de Lyon (INSA Lyon)
  • Guiffard Benoit
    Laboratoire de Génie Electrique et Ferroélectricité (LGEF), Institut National des Sciences Appliquées de Lyon (INSA Lyon)
  • Lebrun Laurent
    Laboratoire de Génie Electrique et Ferroélectricité (LGEF), Institut National des Sciences Appliquées de Lyon (INSA Lyon)
  • Guyomar Daniel
    Laboratoire de Génie Electrique et Ferroélectricité (LGEF), Institut National des Sciences Appliquées de Lyon (INSA Lyon)

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Copper powder dispersed poly-methyl methacrylic acid (acrylic resin, PMMA) composites (PMMA-Cu) were prepared by the solution cast method. The Cu addition at the critical volume fraction (15.0±1.0 vol%Cu) drastically enhanced the electric conductivity from the insulator (10−14 Sm−1) to the electric conductor (105 Sm−1). The electric conductivity can be obtained by controlling the volume fraction of copper powders in PMMA polymers, as dilatation. The addition of 10 vol%Cu slightly enhanced the impact value of PMMA, whereas the remarkable decrease in the Charpy impact value was found at 25±5 vol%Cu. The high conductive PMMA-Cu composites (from 15 to 20 vol%Cu) with high impact value (5.5±0.5 kJm−2), which was higher than that of dispersed nylon6 composites (2 kJm−2) utilized for practical exteriors, were obtained without impact value decay by addition of small amount of copper powders.

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