Pros and cons of melt annealing on the properties of MWCNT/polypropylene composites (Articolo in rivista)

Type
Label
  • Pros and cons of melt annealing on the properties of MWCNT/polypropylene composites (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.polymdegradstab.2014.08.018 (literal)
Alternative label
  • Gentile, Gennaro; Ambrogi, Veronica; Cerruti, Pierfrancesco; Di Maio, Rosa; Nasti, Giuseppe; Carfagna, Cosimo (2014)
    Pros and cons of melt annealing on the properties of MWCNT/polypropylene composites
    in Polymer degradation and stability
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gentile, Gennaro; Ambrogi, Veronica; Cerruti, Pierfrancesco; Di Maio, Rosa; Nasti, Giuseppe; Carfagna, Cosimo (literal)
Pagina inizio
  • 56 (literal)
Pagina fine
  • 64 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.scopus.com/record/display.url?eid=2-s2.0-84907419439&origin=inward (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 110 (literal)
Rivista
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Composites and Biomaterials (IPCB-CNR); Universita degli Studi di Napoli Federico II (literal)
Titolo
  • Pros and cons of melt annealing on the properties of MWCNT/polypropylene composites (literal)
Abstract
  • The combined effect of melt annealing and surface modification of multiwalled carbon nanotubes (MWCNT) on polypropylene (PP) based nanocomposites is reported. Melt annealing markedly improved the filler dispersion in PP. The rheological and electrical percolative threshold was achieved at a content of 3 wt% MWCNT, due to the dynamic reconstruction of nanotube network in the polymer matrix. This behaviour was particularly evident in the case of surface-modified MWCNT. However, the heat treatment also induced an overall worsening of mechanical properties due to polymer heterogeneous oxidation at a microscopic scale, as detected by oxygen mapping through SEM/EDS. Crack initiation sites eventually leading to the failure of the polymer were formed due to peroxide-mediated spreading of oxidation, radiating from residual polymerisation catalyst particles. FTIR-ATR spectroscopy demonstrated that blooming of the phenol stabilizer due to thermal annealing was responsible for early oxidation of polypropylene. The reported results highlight the advantages and drawbacks of physical strategies designed to improve the dispersion stability of nanotubes in polymer nanocomposites. (literal)
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