Electrical behavior of polypropylene composites melt mixed with carbon-based particles: Effect of the kind of particle and annealing process
Author
dc.contributor.author
Garzón, Cristhian
Author
dc.contributor.author
Palza Cordero, Humberto
es_CL
Admission date
dc.date.accessioned
2014-12-23T15:35:52Z
Available date
dc.date.available
2014-12-23T15:35:52Z
Publication date
dc.date.issued
2014
Cita de ítem
dc.identifier.citation
Composites Science and Technology 99 (2014) 117–123
en_US
Identifier
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DOI: 10.1016/j.compscitech.2014.05.018
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/126773
General note
dc.description
Artículo de publicación ISI
en_US
Abstract
dc.description.abstract
Polypropylene (PP) composites with different carbon-based fillers such as graphite (G), thermally
reduced graphene oxide (TrGO), and carbon nanotubes (CNT) were prepared by the melt mixed method
and the effect of the kind of particle and the annealing process on the electrical behavior was analyzed.
Our results show that the electrical conductivity of the resulting composites strongly depends on the
filler used. The lowest electrical percolation threshold is obtained when CNT is used as filler whereas
when TrGO is used this threshold increases by a factor of two. Noteworthy, composites based on
G-microparticles present a percolation process at concentrations one order of magnitude higher than
those based on CNT. By annealing the composites at the melt state, the electrical conductivity can be
improved several orders of magnitude although depending on the carbon-based particle and its
concentration. In particular, composites at concentrations of CNT and G around the percolation threshold
are largely affected by the annealing process. The electrical conductivity can also be increased by adding
CNT particles to PP/TrGO composites having as consequence a decrease in its percolation threshold.