Multi-walled carbon nanotube filled polypropylene nanocomposites based on masterbatch route: Improvement of dispersion and mechanical properties through PP-g-MA addition

By Kalappa Prashantha, J. Soulestin, M. Lacrampe, M. Claes, G. Dupin, P. Krawczak. 2008

201 citations recorded by the source corpus.

Multi-wall carbon nanotubes (MWNTs) filled polypropylene (PP) nanocomposites were prepared through dilut- ing a PP/MWNT masterbatch in a PP matrix by melt compounding with a twin screw extruder. Polypropylene grafted maleic anhydride (PP-g-MA) was used to promote the carbon nanotubes dispersion. The effect of PP-g-MA addition on the rheological, mechanical and morphological properties of the nanocomposites was assessed for different MWNTs loadings. Scanning electron microscopy (SEM) has shown that nanotubes are distributed reasonably uniformly. A better dispersion and good adhesion between the nanotubes and the PP matrix is caused by wrapping of PP-g-MA on MWNTs. When PP-g- MA is added, dynamic moduli and viscosity further increases compared to PP/MWNT nanocomposites. The rheological percolation threshold drops significantly. Tensile and flexural moduli and Charpy impact resistance of the nanocomposites also increases by the addition of PP-g-MA. The present study confirms that PP-g-MA is efficient to promote the dispersion of MWNTs in PP matrix and serves as an adhesive to increase their interfacial strength, hence greatly improving the rheo- logical percolation threshold and mechanical properties of PP/MWNT nanocomposites.

Subfields: Materials Chemistry, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/a47b2d55b8a73a2b83d137bc57f0782ce05d2200

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