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Improvement of mechanical and dielectrical properties of ethylene propylene diene monomer (EPDM)/barium titanate (BaTiO3) by layered mica and graphite flakes

Su, Jun; Zhang, Jun

Composites -- Elsevier Science Pub. Co. -- Volume: 112 C; (pages 148-157) -- 2017

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  • Title:
    Improvement of mechanical and dielectrical properties of ethylene propylene diene monomer (EPDM)/barium titanate (BaTiO3) by layered mica and graphite flakes
  • Author: Su, Jun;
    Zhang, Jun
  • Found In: Composites. Volume 112:Number C(2017); 20170301; 148-157
  • Journal Title: Composites
  • Subjects: Composite materials; Materials science; Composite materials; LCSH: Composite materials; LCSH: Materials science; Dewey: 620.118
  • Rights: Licensed
  • Publication Details: Elsevier Science Pub. Co.
  • Abstract: AbstractIn this study, ethylene propylene diene monomer (EPDM)/barium titanate (BaTiO3)/mica (or graphite) composites with different volume fraction of mica (or graphite) were prepared by two-roll milling process. Thermal conductivity, crosslink density, cure, rheological, mechanical and dielectrical properties of composites were investigated. The results of rheological properties indicated that the 15 vol% mica made the complex viscosity of EPDM/BaTiO3compound to become non-sensitive to varying shear. In terms of mechanical properties, only 5 vol% graphite flakes remarkably improved the tensile strength of EPDM/BaTiO3(70/30) from 7.47 MPa to 13.20 MPa (76% increase). By comparison, the 20 vol% mica just increased the tensile strength of EPDM/BaTiO3(70/30) to 12.10 MPa. In addition, 20 vol% graphite flakes boosted the thermal conductivity and dielectric constant of EPDM/BaTiO3(70/30) from 0.323 W m−1 K−1and 7.1 at 40 MHz to 2.421 W m−1 K−1(749% increase) and 70 at 40 MHz (almost 1000% increase), respectively. The excellent electric and thermal performance was attributed to the mobile π electrons in graphite flakes.
  • Identifier: Journal ISSN: 1359-8368
  • Publication Date: 2017
  • Physical Description: Electronic
  • Shelfmark(s): ELD Digital store
    3365.620000
  • UIN: ETOCvdc_100041826034.0x000001

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