The influence of crystallinity on radiation stability of UHMWPE
Ewa Maria Kornacka , Grażyna Przybytniak , Wojciech Święszkowski
AbstractThe 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.
|Journal series||Radiation Physics and Chemistry, ISSN 0969-806X|
|Publication size in sheets||0.5|
|Keywords in English||UHMWPE; EPR; Free radicals; Degree of crystallinity|
|Score|| = 25.0, 25-06-2020, ArticleFromJournal|
= 25.0, 25-06-2020, ArticleFromJournal
|Publication indicators||= 9; = 5; = 4.0; : 2013 = 1.079; : 2013 = 1.189 (2) - 2013=1.296 (5)|
|Citation count*||4 (2015-05-14)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.