Study of the electrical properties of polystyrene-foliated graphite composite

• Autorzy: Srivastava, N. K. , Mehra, R. M.
• Języki publikacji: EN

Abstrakty

EN

The present paper reports the development of polystyrene-foliated graphite composites via a hot compression moulding technique. Foliated graphite, as obtained by the sonication of expanded graphite, was used as a filler. A distinct percolative behaviour was observed in the variation of conductivity of the composites as a function of graphite concentration. At the percolation concentration of graphite content (0.02 vol. fraction), the conductivity is found to be ca. 10-5 S/cm. The percolation behaviour was analyzed using the generalized effective media equation. An estimation of the interparticle distance between the filler particles/clusters in the composites was made. The analysis of current-voltage characteristics revealed that near the percolation threshold the electrical transport is due to tunnelling of charge carriers, while above the threshold it is ohmic in nature.

Słowa kluczowe

EN

polymer composites; electrical properties; percolation threshold; scanning electron microscopy (SEM)

• Czasopismo: Materials Science Poland
• Rocznik: 2009
• Tom: Vol. 27, No. 1
• Strony: 109--122
• Opis fizyczny: Bibliogr. 39 poz.

Twórcy

autor

Srivastava, N. K.

autor

Mehra, R. M.

• Department of Electronic Science, University of Delhi South Campus, New Delhi - 110 021, India

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