Document Detail

Detection of peroxy species in ultra-high-molecular-weight polyethylene by Raman spectroscopy.
MedLine Citation:
PMID:  9061182     Owner:  NLM     Status:  MEDLINE    
Samples of gamma-sterilized ultra-high-molecular-weight polyethylene (UHMWPE) have been examined using infrared and Raman spectroscopies. Infrared spectra of microtomed sections of a thick segment of material exhibited carbonyl bands whose intensity was consistent with published data. Raman spectroscopy has been used for the first time to detect oxidized precursors to the commonly found carbonyl species. Gamma-sterilized plates examined as soon as possible after sterilization exhibited bands consistent with epoxide, alcohol and three different peroxy-containing species. The detection of these species in irradiated UHMWPE is reported for the first time and demonstrates that oxidation of this material proceeds via a gamma-induced free radical mechanism, as has been widely assumed.
D H Chenery
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biomaterials     Volume:  18     ISSN:  0142-9612     ISO Abbreviation:  Biomaterials     Publication Date:  1997 Mar 
Date Detail:
Created Date:  1997-06-13     Completed Date:  1997-06-13     Revised Date:  2001-11-28    
Medline Journal Info:
Nlm Unique ID:  8100316     Medline TA:  Biomaterials     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  415-9     Citation Subset:  IM    
Smith & Nephew Group Research Centre, York Science Park, Heslington, UK.
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MeSH Terms
Gamma Rays
Molecular Weight
Peroxides / analysis*
Polyethylenes / analysis*,  chemistry*,  radiation effects
Polypropylenes / analysis*,  chemistry*,  radiation effects
Spectrophotometry, Infrared
Spectrum Analysis, Raman
Reg. No./Substance:
0/Peroxides; 0/Plastipore; 0/Polyethylenes; 0/Polypropylenes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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