Počet záznamů: 1
Selected degradation reactions in polyethylene irradiated with Ar and Xe ions
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SYSNO ASEP 0185042 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Selected degradation reactions in polyethylene irradiated with Ar and Xe ions Tvůrce(i) Prošková, K. (CZ)
Švorčík, V. (CZ)
Rybka, V. (CZ)
Hnatowicz, Vladimír (UJF-V) RIDZdroj.dok. Radiation Physics and Chemistry. - : Elsevier - ISSN 0969-806X
Roč. 58, - (2000), s. 153-156Poč.str. 4 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Vědní obor RIV BG - Jaderná, atomová a mol. fyzika, urychlovače CEZ AV0Z1048901 - UJF-V Anotace Polyethylene (PE) was irradiated with 63 keV Ar.sub.+ and156 keV Xe.sub.+ ions (R.sup.p=100 nm for both ions) to the fluences from 1 x 10.sub.13 to 3 x 10.sub.15 cm.sub.-2. Degradation processes in the PE surface layer, modifiedby the ion irradiation, were characterized by measuring by measuring depth profiles of residual hydrogen and incorporated oxygen (RBS/ERD techniques), free radical concentration (EPR) and conjugated double bond concentration (UV-VIS). Dehydrogenation due to release of a part of volatile degradation products was observed. Interactions among free radicals, produced along the ion path, result in a creation of new, conjugated double bonds. Some of free radicals react with oxygen coming from ambient atmosphere inthe ion implanter and in this way, oxidized structures are produced. Dehydrogenation of PE chains and degradation of oxidized structures, appear to be related to the energy locally deposited via ion electronic energy loss. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2001
Počet záznamů: 1