Lowering the percolation threshold in carbon black-filled polymer composites

J. C. Grunlan, W. W. Gerberich, L. F. Francis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

In an effort to lower the percolation threshold of carbon black-filled polymer composites, various polymer microstructures were examined. Composites prepared with a polyvinyl acetate (PVAc) latex and a poly(vinyl acetate-ethylene) water-dispersible powder showed a significantly lowered percolation threshold relative to an equivalently prepared composite that used a polyvinyl alcohol (PVA) solution to form the matrix phase. The percolation threshold of the dispersion-based composites occurred at 5 vol.% carbon black, while the equivalent solution-based composite produced a threshold at 14 vol.%. By excluding the carbon black from regions occupied by polymeric particles, the dispersion-based composites lead to preferential aggregation of carbon black, as evidenced by SEM, and a lowered percolation threshold.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages383-387
Number of pages5
Volume576
StatePublished - 1999
EventProceedings of the 1999 MRS Spring Meeting - Symposium DD, 'Organic/Inorganic Hybrid Materials' - San Francisco, CA, USA
Duration: Apr 5 1999Apr 9 1999

Other

OtherProceedings of the 1999 MRS Spring Meeting - Symposium DD, 'Organic/Inorganic Hybrid Materials'
CitySan Francisco, CA, USA
Period4/5/994/9/99

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