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Rheology, Processing and Electrical Properties of Multiwall Carbon Nanotube/Polypropylene Nanocomposites

Published

Author(s)

S B. Kharchenko, Kalman D. Migler, Jack F. Douglas, Jan Obrzut, E A. Grulke

Abstract

Dispersal of a relatively small concentration [O (1 %) volume fraction] of multiwall carbon nanotubes (MWNT) into polypropylene (PP) is found to cause large and complex changes in nanocomposite transport properties. Specifically, both the shear viscosity and electrical conductivity of the MWNT nanocomposites decrease strongly with shear rate and, moreover, these dispersions exhibit impressively large and negative normal stresses. Additionally, when extruded, MWNT nanocomposites shrink rather than swell. We associate these flow-induced property changes with the formation of non-equilibrium percolated nanotube network structures.
Proceedings Title
Society of Plastics Engineers, Annual Technical Conference| 62nd Volume II | ANTEC 2004: Annual Technical Conference Proceedings | Society of Plastics Engineers
Conference Dates
May 1, 2004
Conference Title
ANTEC (Society of Plastics Engineers. Technical Conference)

Keywords

carbon nanotubes, electrical conductivity, normal sress, percolation, rheology

Citation

Kharchenko, S. , Migler, K. , Douglas, J. , Obrzut, J. and Grulke, E. (2004), Rheology, Processing and Electrical Properties of Multiwall Carbon Nanotube/Polypropylene Nanocomposites, Society of Plastics Engineers, Annual Technical Conference| 62nd Volume II | ANTEC 2004: Annual Technical Conference Proceedings | Society of Plastics Engineers, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852271 (Accessed July 23, 2024)

Issues

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Created May 1, 2004, Updated February 17, 2017