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AC Electrical Properties of Titanate-Linkcoupled Carbon Black Filled Polypropylene Composites

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Abstract:

In this paper, Carbon black was activated using titanate-type coupling agent, and then filled into polypropylene to prepare conductive composites, whose alternating current (AC) electrical properties, including impendence Z, phase angel θ, dielectric constantε and dissipation factor tgδ that is a function of frequency and carbon black concentration were investigated by AC impedance spectroscopy. The percolation threshold of 5wt% carbon black concentration was obtained from the experimental result of volume resistivity for the conductive composites. It was found that the variation of AC electrical properties, which is a function of frequency, was dramatic and dependent on the filler concentration. It was also found that dependence of the real and the imaginary parts of impendence on frequency decreased with the increased concentration of carbon black, while the phase angle, dielectric constant and dissipation factor increased. The AC electrical properties were given based on the conductive network model and the corresponding equivalent circuit were concluded

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Periodical:

Applied Mechanics and Materials (Volumes 217-219)

Pages:

644-651

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.217-219.644

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Online since:

November 2012

Authors:

Nai Xiu Ding, Li Li Wang, Mao Sheng Zhan, Liang Liu, Shuai Feng Xu

Keywords:

Alternating Current Electrical Properties, Carbon Black (CB), Conductive Composites, Polypropylene (PP), Titanate-Type Coupling Agent

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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