Dielectric behavior induced by vitamin E and electron beam irradiation in ultra-high molecular weight polyethylene

Jose Antonio Puértolas, Maria Jose Martínez-Morlanes, Roberto Teruel, Alfonso Martinez-Felipe, Ebru Oral, Francisco Javier Pascual, Amparo Ribes

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Radiation cross-linked ultra high molecular weight polyethylenes (UHMWPEs) have been successfully used as wear resistant bearing surfaces in total joint arthroplasty. A recent development in this field is the incorporation of the antioxidant vitamin E into radiation cross-linked UHMWPE. This study investigates the effects of radiation cross-linking and vitamin E incorporation on the dielectric behavior of UHMWPE. The dielectric relaxations of virgin and 0.1 wt % vitamin E-blended UHMWPE and their irradiated counterparts (up to 300 kGy dose) were investigated. To determine the effect of vitamin E content alone, vitamin E-loaded UHMWPEs were used. The results showed that radiation cross-linking and vitamin E content both increased dielectric polarization in UHMWPE and under some conditions induced electrical conductivity. This result is significant because it shows that the conductive response of UHMWPE-bearing surfaces may depend on manufacturing processes and additives.
Original languageEnglish
Article number40844
Number of pages8
JournalJournal of Applied Polymer Science
Issue number19
Early online date14 Jul 2014
Publication statusPublished - 5 Oct 2014



  • biomaterials
  • crosslinking
  • dielectric properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Biomaterials

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