Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Correlation of oxidation, Crosslinking, and Wear of UHMWPE

초고분자량 폴리에틸렌의 산화, 가교, 마멸과의 상관관계

  • 이권용 (대구대학교 자동차 ·산업 · 기계공학부) ;
  • 김석영 (영남대학교 금속 및 재료공학부) ;
  • 김신윤 (경북대학교 정형외과교실)
  • Published : 2000.08.01
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Abstract

The effect of post-irradiation shelf-aging time on the wear of UHMWPE was investigated, and wear results were correlated with the time-dependent microstructural changes of polyethylene after gamma irradiation sterilization. The levels of oxidation and crosslinking in the shelf-aged acetabular liners were examined by FTIR and hot xylene extraction, respectively, and uni-directional repeat pass sliding wear tests were conducted by using a pin-on-disc wear tester. Gamma irradiation sterilization in the air environment caused an increase of oxidation, crosslinking, and wear resistance. With aging, however, oxidation progressed and decreased the level of crosslinking. This resulted in a decrease of wear resistance of UHMWPE that was accompanied with white bands and brittle cracking.

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References

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