Memorias de investigación
Research Publications in journals:
Mechanical and thermal behaviour of isotactic polypropylene reinforced with inorganic fullerene-like WS2 nanoparticles: Effect of filler loading and temperature
Year:2013

Research Areas
  • Organic materials,
  • Nanomaterials,
  • Polymers

Information
Abstract
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.
International
Si
JCR
Si
Title
Materials Chemistry And Physics
ISBN
0254-0584
Impact factor JCR
2,072
Impact info
Volume
141
http://dx.doi.org/10.1016/j.matchemphys.2013.06.03
Journal number
2-3
From page
979
To page
989
Month
SEPTIEMBRE
Ranking
Q2
Participants

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Bioingeniería y Materiales (BIO-MAT)
  • Departamento: Ingeniería y Ciencia de los Materiales