Electrical conductivity changes of silicone or polyurethane rubber/carbon black composites during cyclic pressure deformation.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F02%3A63500596" target="_blank" >RIV/70883521:28110/02:63500596 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Electrical conductivity changes of silicone or polyurethane rubber/carbon black composites during cyclic pressure deformation.
Original language description
Elastic composites consisting of a non-conductive matrix and conductive filler change their electrical properties under deformation, which enables them to be used as pressure sensors. For this purpose change in electrical conductivity of carbon black/silicone or polyurethane rubber composites during cyclic pressure deformation has been studied. The findings revealed that the character of conductivity changes depends on the filler concentration. While below the percolation threshold the conductivity decreases with the pressure deformation, above this critical filler content conductivity increases. This behaviour is explained as a result of the different space structure of conducting particles in the composite matrix. Cyclic pressure experiments showed that even a small deformation causes irreversible changes in the composite structure and, consequently, non-reproducibility of the repeated loadings.
Czech name
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Czech description
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Project
<a href="/en/project/GP104%2F01%2FP129" target="_blank" >GP104/01/P129: The influence of deformation on the change of elastic composites electrical behaviour at the percolation threshold</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2002
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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