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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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
Volume131
Issue number19
Early online date14 Jul 2014
DOIs
Publication statusPublished - 5 Oct 2014

Keywords

  • biomaterials
  • crosslinking
  • dielectric properties

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