UV degradation of clay-reinforced polypropylene nanocomposites

  1. Get@NRC: UV degradation of clay-reinforced polypropylene nanocomposites (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1002/pen.24273
AuthorSearch for: ; Search for: ; Search for: ; Search for:
Journal titlePolymer Engineering and Science
SubjectComposite materials; Elastic moduli; Fourier transform infrared spectroscopy; Injection molding; Nanoindentation; Polypropylenes; Reinforced plastics; X ray analysis; X ray diffraction; X ray diffraction analysis; Degradation process; FTIR spectroscopy; Micromechanical property; Montmorillonite clay; Nanoindentation techniques; Nanoindentation tests; Polypropylene nanocomposites; Wide angle Xray diffraction; Nanocomposites
AbstractThe aim of this work is to experimentally characterize the UV-degradation process at both the surface and at different layers across the thickness of injection-molded polypropylene (PP) matrix containing different amounts of nanosized montmorillonite (MMT) clay particles. These nanocomposite materials have been exposed to UV irradiations (λ=320 nm) at different preset temperatures (25, 45, and 65°C) in the presence of oxygen and during different exposure times. The extent of such process at these layers was determined using both the FTIR spectroscopy and the wide-angle X-ray diffraction analyses. The micromechanical properties across the thickness have been characterized using the nanoindentation technique. The obtained results have indicated that the UV-degradation process for the nanocomposite materials is much more intense than the one observed for the neat PP. Moreover, it has been noted that such degradation process is not uniform across the thickness of the exposed materials. Results obtained from the X-ray analysis have shown an increase of the crystallinity of the polymer molecules at only the external surface of the exposed materials. This was confirmed using the nanoindentation test as an increase of the Young's modulus at this layer was noted.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); Automotive and Surface Transportation
Peer reviewedYes
NPARC number21277479
Export citationExport as RIS
Report a correctionReport a correction
Record identifier1b1ae49e-a92d-4935-9190-56ebdbaa1d42
Record created2016-03-09
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)