Influence of organo-clay on electrical and mechanical properties of PP/MWCNT/OC nanocomposites

The electrical, thermal and mechanical properties of nanocomposites, based on polypropylene (PP) filled by multi-walled carbon nanotubes (MWCNTs) and organo-clay (OC), were studied with the purpose of finding out the effect of OC on the microstructure of MWCNTs dispersion and PP/MWCNT/OC composites....

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Bibliographic Details
Published in:European polymer journal 2011-07, Vol.47 (7), p.1351-1360
Main Authors: Levchenko, V., Mamunya, Ye, Boiteux, G., Lebovka, M., Alcouffe, P., Seytre, G., Lebedev, E.
Format: Article
Language:English
Subjects:
Applied sciences
Carbon nanotubes
Chemical Sciences
Composites
Dispersions
Exact sciences and technology
Forms of application and semi-finished materials
Material chemistry
Mechanical properties
Nanocomposite
Nanocomposites
Nanomaterials
Nanostructure
Organo-clay
Percolation threshold
Polymer industry, paints, wood
Polymer matrix composites
Polymers
Polypropylenes
Technology of polymers
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Summary:The electrical, thermal and mechanical properties of nanocomposites, based on polypropylene (PP) filled by multi-walled carbon nanotubes (MWCNTs) and organo-clay (OC), were studied with the purpose of finding out the effect of OC on the microstructure of MWCNTs dispersion and PP/MWCNT/OC composites. It was found that addition of organo-clay nanoparticles improved nanotube dispersion and enhanced electrical properties of PP/MWCNT nanocomposites. Addition of organo-clay (MWCNT/OC ratio was 1/1) reduced the percolation threshold of PP/MWCNT nanocomposites from ϕ c = 0.95 vol.% to ϕ c = 0.68 vol.% of carbon nanotubes, while the level of conductivity became 2–4 orders of magnitude higher. The DSC and DMA analyses have shown that the influence of organo-clay on the thermal and mechanical properties of material was not significant in composites with both fillers as compared to PP/OC. Such an effect can be caused by stronger interaction of OC with carbon nanotubes than with polymer matrix.
ISSN:0014-3057
1873-1945
DOI:10.1016/j.eurpolymj.2011.03.012