Hybrids nanocomposites based on a polymer blend (linear low-density polyethylene/poly(ethylene-co-methyl acrylate) and carbonaceous fillers (graphene and carbon nanotube)
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2021
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Polymer Composites
Resumo
Interfacial or separate phase location of carbonaceous nanofillers (graphene
and carbon nanotubes) in polymer blends with co-continuous phases can lead
to double percolation behavior, significantly increasing rheological and electrical
properties. The prediction of the morphology and the location of the
nanofillers has been used as a tool to evaluate the proprieties of co-continuous
polymer blends. This work aims to highlight the superior conductivity levels
achieved using a low amount of carbon-based fillers, by the proper selection in
a multiphase polymer matrix as a template for controlled dispersion and spatial
distribution of the nanoparticles, offering a compromise between easy processability
and enhanced performance. Here, two polymers (linear low-density
polyethylene [LLDPE] and ethylene-co-methylacrylate [EMA]) and their cocontinuous
blend (LLDPE/EMA) were loaded with nanofillers (few-layer
graphene [FLG], few-walled carbon nanotube [FWCNT]) via continuous melt
mixing in twin-screw extrusion, separate and simultaneously. It was observed
that the addition of the nanofillers changed the co-continuity of the blend, with
the probable migration of the nanofillers from the EMA (hydrophilic) phase to
the LLDPE (hydrophobic) phase. Rheological percolation occurred preferentially
in blends containing FWCNT and FLG/FWCNT. Electrical conductivity
was observed in all compositions, with higher electrical conductivity being
noticed in hybrids.
Como referenciar
NUNES, MARIO A.B.S.; MATOS, BRUNO R. de; SILVA, GLAURA G.; ITO, EDSON N.; MELO, TOMAS J.A. de; FECHINE, GUILHERMINO J.M. Hybrids nanocomposites based on a polymer blend (linear low-density polyethylene/poly(ethylene-co-methyl acrylate) and carbonaceous fillers (graphene and carbon nanotube). Polymer Composites, v. 42, n. 2, p. 661-677, 2021. DOI: 10.1002/pc.25856. Disponível em: http://repositorio.ipen.br/handle/123456789/31940. Acesso em: 29 Mar 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.