Affiliation:
1. 1Department of Polymer Technology, Royal Institute of Technology, S-100 44 Stockholm, Sweden
Abstract
Abstract
Oxidative degradation of rubbers, and the development of oxidized layers at the surfaces, results in increased electrical conductivity. This paper shows that for EPDM rubbers heavily oxidized at 200° C, the DC-conductivity increases more than two orders of magnitude, and the percolation threshold for DC conductivity is decreased below 5 phr carbon black. The effect of oxidation upon the electrical properties is explained as being due to the presence of polar groups, e.g., carbonyl groups, in between the carbon-black agglomerates which provide shorter distances for the electrons to tunnel through.
Subject
Materials Chemistry,Polymers and Plastics
Cited by
26 articles.
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