NDLI: Electrical Conductivity and Elastic Properties of MWCNT-PP Nanocomposites

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ngabonziza, Yves Li, Jackie Carol, F. Barry
Copyright Year	2008
Abstract	Electrical and elastic properties of multiwalled carbon nanotubes (MWCNTs) reinforced polypropylene (PP) nanocomposites were studied experimentally and theoretically. The MWCNT-PP nanocomposites samples with a range of 0 to 12 wt% MWCNT were injection molded using different injection velocities. These nanocomposites were characterized for their electrical resistance using 2-Probe measurement and their tensile properties. Parallel to the experimental investigation, a percolation theory was applied to study the electrical conductivity of the nanocomposite system in terms of content of nanotubes and injection rate. Both Kirkpatrick [1] and McLachlan [2] models were used to determine the transition from low conductivity to high conductivity which designates as percolation threshold. Both experimental and modeling results have shown that the electrical conductivity increased suddenly as the content of MWNTs was close to percolation threshold of 3.8 wt%. The injection speed also showed an effect on electrical conductivity of the composites. In addition, several micromechanical models were applied to elucidate the elastic properties of the nanocomposites. The results indicate that the interphase between the carbon nanotubes and polymers plays an important role in determining elastic modulus of the system.
Starting Page	249
Ending Page	255
Page Count	7
File Format	PDF
ISBN	9780791848746
DOI	10.1115/IMECE2008-68431
e-ISBN	9780791838402
Volume Number	Volume 13: Nano-Manufacturing Technology; and Micro and Nano Systems, Parts A and B
Conference Proceedings	ASME 2008 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2008-10-31
Publisher Place	Boston, Massachusetts, USA
Access Restriction	Subscribed
Subject Keyword	Elastic moduli Electrical conductivity Multi-walled nanotubes Nanotubes Elasticity Percolation theory Carbon nanotubes Electrical resistance Multi-walled carbon nanotubes Modeling Tensile strength Composite materials Nanocomposites Polymers Probes
Content Type	Text
Resource Type	Article

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