Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Dependency of the Critical Carbon Content of Electrical Conductivity for Carbon Powder-Filled Polymer Matrix Composites

  • Shin, Soon-Gi (Department of Advanced Materials Engineering, College of Samcheok, Kangwon National University)
  • Received : 2015.06.14
  • Accepted : 2015.07.13
  • Published : 2015.08.27
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Abstract

This paper investigates the dependency of the critical content for electrical conductivity of carbon powder-filled polymer matrix composites with different matrixes as a function of the carbon powder content (volume fraction) to find the break point of the relationships between the carbon powder content and the electrical conductivity. The electrical conductivity jumps by as much as ten orders of magnitude at the break point. The critical carbon powder content corresponding to the break point in electrical conductivity varies according to the matrix species and tends to increase with an increase in the surface tension of the matrix. In order to explain the dependency of the critical carbon content on the matrix species, a simple equation (${V_c}^*=[1+ 3({{\gamma}_c}^{1/2}-{{\gamma}_m}^{1/2})^2/({\Delta}q_cR]^{-1}$) was derived under some assumptions, the most important of which was that when the interfacial excess energy introduced by particles of carbon powder into the matrix reaches a universal value (${\Delta}q_c$), the particles of carbon powder begin to coagulate so as to avoid any further increase in the energy and to form networks that facilitate electrical conduction. The equation well explains the dependency through surface tension, surface tensions between the particles of carbon powder.

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References

  1. J. P. Reboul, Carbon Black-Polymer Composites, p. 80-120, Marcel Dekker, New York (1982).
  2. Y. Song, T. W. Noh, S. I. Lee and J. R. Gaines, Phys. Rev. B, 33, 904 (1986). https://doi.org/10.1103/PhysRevB.33.904
  3. I. Balberg, Phys. Lett., 59, 1305 (1987). https://doi.org/10.1103/PhysRevLett.59.1305
  4. S. G. Shin, Kor. J. Met. Mater., 48(9), 867 (2010). https://doi.org/10.3365/KJMM.2010.48.09.867
  5. S. G. Shin, Electron. Mater. Lett., 6(2), 65 (2010). https://doi.org/10.3365/eml.2010.06.065
  6. A. Ishida, M. Miyayama, A. Kishimoto and H. Yanagida, J. Ceram. Soc. Jpn., 103, 6 (1995). https://doi.org/10.2109/jcersj.103.6
  7. P. J. Flory, Principles of Polymers Chemistry, Connell Univ. Press, Chap. 9 (1953).
  8. A. K. Sircar and T. G. Lamond, Rubber Chem. Tech., 50, 735 (1977). https://doi.org/10.5254/1.3535171
  9. A. Tanioka, K. Miyasaka and K. Ishikawa, J. Polymer. Sci. (eds., Polymer. Phys.), 883 (1982).
  10. Y. Kitazaki and T. Hata, J. Adhesion Soc. Jpn. 8, 131 (1973).
  11. M. L. Williams, R. F. Landel and J. Ferry, J. Amer. Chem. Soc., 77, 3701 (1955). https://doi.org/10.1021/ja01619a008
  12. M. J. Kim and J. B. Yoo, Electron Mater. Lett., 4, 57 (2008).
  13. S. W. Kim, W. S. Chung, K. -S. Sohn, C. -Y. Son and S. Lee, Kor. Inst. Met. Mater., 47, 50 (2009).
  14. F. M. Fowkes, Ind. Eng. Chem., 56, 40 (1964).