期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 112, 期 1, 页码 425-433出版社
WILEY
DOI: 10.1002/app.29422
关键词
composites; fillers; injection molding; nanocomposites
资金
- U.S. Department of Energy [DE-FG36-08GO88104]
- National Science Foundation [DMI-0456537]
Adding conductive carbon fillers to insulating thermoplastic resins increases composite electrical conductivity. Often, as much of a single type of carbon filler is added to achieve the desired conductivity and still allow the material to be molded into a bipolar plate for a fuel cell. In this study, various amounts of three different carbons (carbon black, synthetic graphite particles, and carbon nanotubes) were added to polypropylene resin. The resulting single-filler composites were tested for electrical resistivity (1/electrical conductivity). The effects of single fillers and combinations of the different carbon fillers were Studied via a factorial design. The percolation threshold was 1.4 vol % for the composites containing only carbon black, 2.1 vol % for those containing only carbon nanotubes, and 13 vol %, for those containing only synthetic graphite particles. The factorial results indicate that the composites containing only single fillers (synthetic graphite followed closely by carbon nanotubes and then carbon black) caused a statistically significant decrease in composite electrical resistivity. All of the composites containing combinations of different fillers had a statistically significant effect that increased the electrical resistivity. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 112: 425-433, 2009
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