Electrical properties of crosslinked polyethylene/carbon black switching composites as a function of morphology and structure of the carbon black
| Autor: | Peng Xiao, Renrui Teng, Gengcheng Yang |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Materials science
Polymers and Plastics Composite number chemistry.chemical_element General Chemistry Carbon black Conductivity Polyethylene Microstructure chemistry.chemical_compound chemistry Electrical resistivity and conductivity Materials Chemistry Ceramics and Composites Composite material Temperature coefficient Carbon |
| Zdroj: | Polymer Composites. 18:477-483 |
| ISSN: | 1548-0569 0272-8397 |
| DOI: | 10.1002/pc.10299 |
| Popis: | The electrical resistivity of a radiation-crosslinked polyethylene/carbon black switching composite was investigated as a function of carbon black content and temperature. Carbon blacks of different morphology and microstructure behaved differently regarding the electrical resistivity. A HG black, highly porous and structured, imparts high conductivity to its composite mixture at a low degree of loading, whereas nonporous acetylene EQ black of like structure requires a higher degree of loading to impart the same conductivity. The PTC (positive temperature coefficient) effect anomaly was smaller for HG black than for EQ black. It was found that the PTC anomaly was heightened when a combination of the two different carbon blacks was mixed into the composites. Suggestions as to the causes for this particular behavior are made with reference to the electron micrography and other parameters for microstructure of the two carbon blacks. |
| Databáze: | OpenAIRE |
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