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Thermal and Electrical Transport Properties of Sheared and Un-Sheared Thin-Film Polymer/CNTs Nanocomposites

Published online by Cambridge University Press:  17 June 2014

Parvathalu Kalakonda ,
Georgi Y. Georgiev ,
Yaniel Cabrera ,
Robert Judith ,
Germano S. Iannacchione  and
Peggy Cebe
Parvathalu Kalakonda
Affiliation:
Department of Physics, Worcester Polytechnic Institute, Worcester, MA, 01609, USA Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA
Georgi Y. Georgiev
Affiliation:
Department of Natural Sciences - Physics, Assumption College, Worcester, MA, 01609, USA Department of Physics, Tufts University, Medford, MA, USA
Yaniel Cabrera
Affiliation:
Department of Physics, Tufts University, Medford, MA, USA
Robert Judith
Affiliation:
Department of Physics, Tufts University, Medford, MA, USA
Germano S. Iannacchione
Affiliation:
Department of Physics, Worcester Polytechnic Institute, Worcester, MA, 01609, USA
Peggy Cebe
Affiliation:
Department of Physics, Tufts University, Medford, MA, USA
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Abstract

Transport properties have been measured transverse to the plane of sheared and un-sheared thin-film nanocomposites of isotactic Polypropylene (iPP) and multiwall carbon nanotubes (MWCNTs) at various MWCNT concentrations. The sheared samples were processed in the melt at 200 0C at 1 Hz in a Linkan microscope shearing hot stage. The thermal and electrical conductivity measurements were performed on the same cell arrangement with the transport perpendicular to the thin-film plane using a DC method. The thermal and electrical conductivity perpendicular to the surface of the films are higher for the un-sheared as compared to the sheared samples. Interestingly, the percolation threshold appears smeared in both conductivity measurements likely due to pressing and shear treatment of the films, or the spacing between the data points. Important for electronics packaging and materials for which those anisotropic properties are highly desired this work presents important advances in understanding the structure-transport property relations.

Keywords

compositefilmpolymer
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1660: Symposium TT – Transport Properties in Nanocomposites , 2014 , mrsf13-1660-tt03-21
Copyright
Copyright © Materials Research Society 2014 

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References

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