Abstract
The present work aims at studying the effect of adding aluminum (Al) powder at different concentrations as white fillers on the electrical and mechanical properties of the acrylonitrile butadiene rubber (NBR) vulcanizates. Tensile strength and elongation at break decreased by the addition of Al up to 150 phr; the experimental stress–strain results showed a good fitting with the general form proposed by Menges and Schmachtenberg ( Kunststoffe 1983; 73: 543–546; Kunststoffe 1987; 77: 289–292), Michaeli et al. ( Kunststoffe 1989; 79: 692–700). For most of the NBR composites, the Poole–Frenkel conduction mechanism was dominant at room temperature. The dielectric characteristics revealed a percolation threshold at 50 phr. Using Tsangaris et al. ( Mater Sci Tech 1996; 12(7): 533) model for all Al volume fractions of Al/NBR composites resulted in a good agreement between the calculated and the experimental values of the dielectric constant. Finally, a simple equivalent circuit model was successfully used to describe frequency dependence of both the dielectric constant and the AC electrical conductivity of Al/NBR composites.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
