Details

Autor(en) / Beteiligte

• Besco, Stefano
• Lorenzetti, Alessandra
• Hrelja, Denis
• Boaretti, Carlo
• Roso, Martina
• Ferri, Dino
• Modesti, Michele

Titel

Influence of Melt Viscosity on the Structure and Properties of Electrically Conductive Nanocomposites Produced by Masterbatch Process

Ist Teil von

• Macromolecular materials and engineering, 2014-07, Vol.299 (7), p.814-824

Ort / Verlag

Weinheim: Blackwell Publishing Ltd

Erscheinungsjahr

2014

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Electrically conductive polypropylene nanocomposites containing multi‐walled carbon nanotubes were produced by melt blending by dilution of a concentrate masterbatch containing 10 wt.% of filler. In order to promote polymer infiltration within primary agglomerates a ultra‐low melt viscosity polypropylene grade has been used for masterbatch production. Moreover, three polypropylenes with different melt viscosities have been used for successive dilutions. Filler dispersion has been assessed by both indirect macroscale analyses and direct morphological investigations. Characterization showed percolation thresholds occurring for very low filler contents. During dilution, lower polymer viscosities lead to more effective residue agglomerates dispersion, hence better electrical properties. Ultra‐low molecular weight polypropylene grade can be successfully used for the production of multi‐walled carbon nanotube(MWCNT)‐based masterbatches but in order to get the optimal dispersion in the final compound the molecular weight of the diluting polymer cannot be too high as to not mix effectively with the masterbatch resin.