Percolation behavior of conductor-insulator composites with varying aspect ratio of conductive fiber
SCIE
SCOPUS
- Title
- Percolation behavior of conductor-insulator composites with varying aspect ratio of conductive fiber
- Authors
- Yi, JY; Choi, GM
- Date Issued
- 1999-10
- Publisher
- KLUWER ACADEMIC PUBL
- Abstract
- The electrical properties of composite electroceramics are determined by the concentration, shape and distribution of filler phase in matrix. The carbon fiber-filled polymer was chosen as a model system and the electrical conductivity was measured as a function of carbon fiber content and the aspect ratio (AR) of the fibers to understand the percolation behavior of the composites. The composites of carbon fiber (1 similar to 9 vol.%) and thermoplastic polymer were fabricated in a mold press with the aspect ratio of carbon fiber varying between 4 and 10. The percolation threshold volume concentrations (V-c) of transition from the insulator to the conductor decreased as the fiber aspect ratio increased. With the fibers segregated at the polymer-polymer interfaces in the present study, V-c values were much smaller than those with the fibers randomly distributed in the matrix shown in other studies. The inverse relation between V-c and AR was found as expected. From the comparison with other experimental and simulated data, we concluded that the slope in 1/V-c versus AR plot is a strong function of fiber segregation.
- Keywords
- percolation; fiber; composite; aspect ratio; conductivity; ELECTRICAL-CONDUCTIVITY; COMPUTER-SIMULATION; POLYMER COMPOSITES; PARTICLE-SIZE; RESISTIVITY; MODEL
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/20189
- DOI
- 10.1023/A:1009913913732
- ISSN
- 1385-3449
- Article Type
- Article
- Citation
- JOURNAL OF ELECTROCERAMICS, vol. 3, no. 4, page. 361 - 369, 1999-10
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- There are no files associated with this item.
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