Production of electrically conducting plastic composites by three-dimensional chaotic mixing of melts and powder additives

Extended micron‐scale structures were produced in thermoplastic melts from initially large clusters of conducting carbon black particles transported by three‐dimensional chaotic mixing. The structures formed extensive networks that were captured by solidification and rendered the materials electrica...

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Bibliographic Details
Published in:Journal of vinyl & additive technology 2000-03, Vol.6 (1), p.26-33
Main Authors: Danescu, R. I., Zumbrunnen, D. A.
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Technology of polymers
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Summary:Extended micron‐scale structures were produced in thermoplastic melts from initially large clusters of conducting carbon black particles transported by three‐dimensional chaotic mixing. The structures formed extensive networks that were captured by solidification and rendered the materials electrically conducting. In essence, percolating structures were constructed in situ in lieu of being the result of chance associations among particles. A systematic study was carried out to assess the influence of key parameters and to relate the electrical properties to the microstructures. Micrographs showed complex structures exhibiting patterns characteristic of chaotic advection. Electrical measurements indicated that conductivity was achieved at carbon black concentrations significantly lower than those achievable by common mixing methods and lower than those reported recently for two‐dimensional chaotic mixing.
ISSN:1083-5601
1548-0585
DOI:10.1002/vnl.10219