Electrical Conductivity and ESR Studies of Carbon-Black-Loaded Natural Rubber

Siswanto, Muliawati G. and Bo, Na Peng and Parangtopo, Parangtopo and Neubacher, H. and Burton, L. C. (1988) Electrical Conductivity and ESR Studies of Carbon-Black-Loaded Natural Rubber. Rubber Chemistry and Technology, 61 (2). pp. 269-280. ISSN 1943-4804

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The results of electrical conductivity and electron spin resonance (ESR) measurements on NR with four types of carbon black filler were reported. Two forms of space change limited current (SCLC) were identified, indicative of different electron trap energies, depending on the type of carbon black filler. Such SCLC behavior, with steep trap-filling regions on the current-voltage curves, is indicative of trap-dominated transport in the polymer regions of carbon-black—NR composites. Discrete shallow traps are evident for two of the compositions; deeper, exponentially distributed traps for two others. ESR spectra of the composites are very pronounced, with lineshape also depending on the type of carbon black used. Observed g-values are close to that of the free electron, and don't vary with carbon black type or temperature. Linewidths narrow and increase in intensity with increasing amount of carbon black, with no detectable g-value shift, indicative of exchange narrowing from nonorbital electrons. The SCLC and ESR results are consistent with a model of electron-hopping transport, with traps playing a prominent role, the trap distribution depending on type of carbon black in the matrix.

Item Type: Article
Subjects: 500 Science and Mathematic > 530 Physics > 537 Electricity and Electronics
600 Technology (Applied Sciences) > 620 Engineering > 620 Engineering and Applied Operations
Divisions: Faculty of Engineering & Informatics > Computer Engineering
Depositing User: Administrator UMN Library
Date Deposited: 02 Dec 2021 18:25
Last Modified: 02 May 2023 03:17
URI: https://kc.umn.ac.id/id/eprint/19350

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