TY - GEN
T1 - Positron lifetimes and mechanical properties of gamma-irradiated ultra high molecular weight polyethylene
AU - Kobayashi, Y.
AU - Yamawaki, M.
AU - Oka, T.
AU - Saiki, S.
AU - Mohamed, Hamdy F.M.
AU - Hattori, K.
AU - Watanabe, Y.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
KW - Degradation
KW - Irradiation
KW - Non-destructive onsite inspection
KW - Positron annihilation lifetime spectroscopy
KW - Ultra high molecular weight polyethylene
UR - http://www.scopus.com/inward/record.url?scp=84871080408&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871080408&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.733.147
DO - 10.4028/www.scientific.net/MSF.733.147
M3 - Conference contribution
AN - SCOPUS:84871080408
SN - 9783037855188
T3 - Materials Science Forum
SP - 147
EP - 150
BT - Positron and Positronium Chemistry X
PB - Trans Tech Publications Ltd
T2 - 10th International Workshop on Positron and Positronium Chemistry, PPC-10
Y2 - 5 September 2011 through 9 September 2011
ER -