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Memorias de investigación
Artículos en revistas:
Mechanical and thermal behaviour of isotactic polypropylene reinforced with inorganic fullerene-like WS2 nanoparticles: Effect of filler loading and temperature
Año:2013
Áreas de investigación
  • Materiales orgánicos,
  • Nanomateriales,
  • Polimeros
Datos
Descripción
The thermal and mechanical behaviour of isotactic polypropylene (iPP) nanocomposites reinforced with different loadings of inorganic fullerene-like tungsten disulfide (IF-WS2) nanoparticles was investigated. The IF-WS2 noticeably enhanced the polymer stiffness and strength, ascribed to their uniform dispersion, the formation of a large nanoparticle?matrix interface combined with a nucleating effect on iPP crystallization. Their reinforcement effect was more pronounced at high temperatures. However, a drop in ductility and toughness was found at higher IF-WS2 concentrations. The tensile behaviour of the nanocomposites was extremely sensitive to the strain rate and temperature, and their yield strength was properly described by the Eyring's equation. The activation energy increased while the activation volume decreased with increasing nanoparticle loading, indicating a reduction in polymer chain motion. The nanoparticles improved the thermomechanical properties of iPP: raised the glass transition and heat deflection temperatures while decreased the coefficient of thermal expansion. The nanocomposites also displayed superior flame retardancy with longer ignition time and reduced peak heat release rate. Further, a gradual rise in thermal conductivity was found with increasing IF-WS2 loading both in the glassy and rubbery states. The results presented herein highlight the benefits and high potential of using IF-nanoparticles for enhancing the thermomechanical properties of thermoplastic polymers compared to other nanoscale fillers.
Internacional
Si
JCR del ISI
Si
Título de la revista
Materials Chemistry And Physics
ISSN
0254-0584
Factor de impacto JCR
2,072
Información de impacto
Volumen
141
DOI
http://dx.doi.org/10.1016/j.matchemphys.2013.06.03
Número de revista
2-3
Desde la página
979
Hasta la página
989
Mes
SEPTIEMBRE
Ranking
Q2
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Ana M. Díez-Pascual (ICTP-CSIC)
  • Autor: Mohammed Naffakh Cherradi-Hadi (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Bioingeniería y Materiales (BIO-MAT)
  • Departamento: Ingeniería y Ciencia de los Materiales
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