On the percolative behavior of carbon black-rubber interlinked systems

A series of SBR-loaded with high abrasion furnace (HAF) carbon black and vu lcanized in contact with NBR have been produced on a laboratory scale, and their dielectric properties were investigated. The dielectric properties of these interlinked systems are described in the frequency range between 10( 2) and 10(5) Hz as a function of frequency, carbon black concentration and vulcanization time. Relatively high values of the dielectric constant were obtained when measuring conductive samples and interlinked samples with sma ll initial vulcanization time. A percolative model gives a suitable explana tion, within the experimental error of the studied systems. (C) 1999 Elsevi er Science Ltd. All rights reserved.