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Positron Lifetimes and Mechanical Properties of Gamma-Irradiated Ultra High Molecular Weight Polyethylene
- Source :
- Materials Science Forum. 733:147-150
- Publication Year :
- 2012
- Publisher :
- Trans Tech Publications, Ltd., 2012.
-
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 non-destructive, 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.
- Subjects :
- Ultra-high-molecular-weight polyethylene
Materials science
Mechanical Engineering
Condensed Matter Physics
Positronium
chemistry.chemical_compound
Positron
Polymer degradation
Nuclear magnetic resonance
chemistry
Mechanics of Materials
General Materials Science
Irradiation
Composite material
Spectroscopy
Positron annihilation
Subjects
Details
- ISSN :
- 16629752
- Volume :
- 733
- Database :
- OpenAIRE
- Journal :
- Materials Science Forum
- Accession number :
- edsair.doi...........126159be87aff6c69f72ed93dc63fad0