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

Published

May 1, 2004

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)

Pub Type

Conferences

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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 December 7, 2024)