Positron lifetimes and mechanical properties of gamma-irradiated ultra high molecular weight polyethylene

Y. Kobayashi, M. Yamawaki, T. Oka, S. Saiki, Hamdy F.M. Mohamed, K. Hattori, Y. Watanabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Positron annihilation lifetime spectroscopy (PALS) has widely been used for probing open volume defects in various materials. PALS is in principle non-destructive, yet conventional PALS is not strictly non-destructive because cutting out of two specimens from the material is required. Recently we developed a novel method of PALS, which is potentially applicable to nondestructive, onsite material inspection. In order to explore the possibility of onsite monitoring of polymer degradation by this novel method of PALS, we studied variations of positron lifetime and mechanical properties of ultra high molecular weight polyethylene (UHMWPE) subjected to γ-irradiation. Correlations were found between the mechanical properties and ortho-positronium lifetimes, suggesting the feasibility of non-destructive, onsite monitoring of polymer degradation by PALS. The effect of γ-irradiation on positronium formation is discussed.

Original languageEnglish
Title of host publicationPositron and Positronium Chemistry X
PublisherTrans Tech Publications Ltd
Pages147-150
Number of pages4
ISBN (Print)9783037855188
DOIs
Publication statusPublished - 2013
Event10th International Workshop on Positron and Positronium Chemistry, PPC-10 - Smolenice Castle, Slovakia
Duration: 2011 Sep 52011 Sep 9

Publication series

NameMaterials Science Forum
Volume733
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other10th International Workshop on Positron and Positronium Chemistry, PPC-10
CountrySlovakia
CitySmolenice Castle
Period11/9/511/9/9

Keywords

  • Degradation
  • Irradiation
  • Non-destructive onsite inspection
  • Positron annihilation lifetime spectroscopy
  • Ultra high molecular weight polyethylene

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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