Mechanical and thermal behaviour of isotactic polypropylene reinforced with inorganic fullerene-like WS2 nanoparticles: Effect of filler loading and temperature

Díez Pascual, Ana María and Naffakh Cherradi Hadi, Mohammed (2013). Mechanical and thermal behaviour of isotactic polypropylene reinforced with inorganic fullerene-like WS2 nanoparticles: Effect of filler loading and temperature. "Materials Chemistry And Physics", v. 141 (n. 2-3); pp. 979-989. ISSN 0254-0584. https://doi.org/10.1016/j.matchemphys.2013.06.039.

Description

Title: Mechanical and thermal behaviour of isotactic polypropylene reinforced with inorganic fullerene-like WS2 nanoparticles: Effect of filler loading and temperature
Author/s:
  • Díez Pascual, Ana María
  • Naffakh Cherradi Hadi, Mohammed
Item Type: Article
Título de Revista/Publicación: Materials Chemistry And Physics
Date: 16 September 2013
ISSN: 0254-0584
Volume: 141
Subjects:
Freetext Keywords: Composite materials; Tension test; Thermal conductivity; Thermomechanical effects
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería y Ciencia de los Materiales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 29033
DC Identifier: http://oa.upm.es/29033/
OAI Identifier: oai:oa.upm.es:29033
DOI: 10.1016/j.matchemphys.2013.06.039
Official URL: http://www.sciencedirect.com/science/article/pii/S0254058413005075#
Deposited by: Memoria Investigacion
Deposited on: 13 Jan 2015 18:23
Last Modified: 01 Nov 2015 23:56
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