The influence of crystallinity on radiation stability of UHMWPE

Ewa Maria Kornacka , Grażyna Przybytniak , Wojciech Święszkowski

Abstract

The influence of ionizing radiation on ultra high molecular weight polyethylene (UHMWPE) was studied using EPR spectroscopy and GC. Two samples of various degree of crystallinity, 85% and 53%, were investigated upon exposure to electron beam. In this study it was found that radicals generated following irradiation decay much faster in amorphous than in crystalline phase. The primary product generated in both phases is second ordered alkyl radical. EPR spectra detected for the sample containing 85% crystalline regions revealed a quintet of hyperfine splitting about 2.28 mT and the signal was tentatively assigned to the product of beta-fragmentation. The radiation yield of hydrogen for two studied samples of various crystallinity was similar. (C) 2012 Elsevier Ltd. All rights reserved.
Author Ewa Maria Kornacka - [Institute of Nuclear Chemistry and Technology, Warsaw]
Ewa Maria Kornacka,,
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, Grażyna Przybytniak - [Institute of Nuclear Chemistry and Technology, Warsaw]
Grażyna Przybytniak,,
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, Wojciech Święszkowski (FMSE / DMD)
Wojciech Święszkowski,,
- Division of Materials Design
Journal seriesRadiation Physics and Chemistry, ISSN 0969-806X
Issue year2013
Vol84
Pages151-156
Publication size in sheets0.5
Keywords in EnglishUHMWPE; EPR; Free radicals; Degree of crystallinity
ASJC Classification3108 Radiation
DOIDOI:10.1016/j.radphyschem.2012.06.027
URL http://www.sciencedirect.com/science/article/pii/S0969806X12003143
Languageen angielski
Score (nominal)25
Score sourcejournalList
ScoreMinisterial score = 25.0, 25-06-2020, ArticleFromJournal
Ministerial score (2013-2016) = 25.0, 25-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 9; WoS Citations = 5; GS Citations = 4.0; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 1.079; WoS Impact Factor: 2013 = 1.189 (2) - 2013=1.296 (5)
Citation count*4 (2015-05-14)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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