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Title
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Chemical changes in irradiated polypropylene studied by X-ray photoabsorption and advanced EPR/ENDOR spectroscopies
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Author
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Abstract
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| Pulsed and Continuous-wave (CW) Electron Paramagnetic Resonance (EPR) in combination with X-ray absorption near edge structure (XANES) analysis is used to study the bulk and surface modification of isotactic polypropylene (i-PP) conducted by X-ray irradiation and O-2, Ar and N-2 plasma treatments. In all cases, a midchain peroxy radical is the major species detected by CW-EPR, with little delocalization onto the i-PP main chain, as revealed by X-band Mims electron nuclear double resonance and hyperfine sublevel correlation. Besides, surface functionalization of plasma treated i-PP is discussed on the light of XANES results with emphasis in the more complex case of N2 plasma modification. The article gives a comprehensive picture of the chemical changes that occur in irradiated i-PP, with implications in sterilization, surface activation, and adhesion enhancement procedures. (C) 2014 Elsevier Ltd. All rights reserved. |
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Language
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English
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Source (journal)
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European polymer journal. - Oxford
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Publication
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Oxford
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2014
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ISSN
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0014-3057
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DOI
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10.1016/J.EURPOLYMJ.2014.01.032
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Volume/pages
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53
(2014)
, p. 223-229
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ISI
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000334481300021
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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