0185042 - UJF-V 20000212 RIV GB eng J - Journal Article
Prošková, K. - Švorčík, V. - Rybka, V. - Hnatowicz, Vladimír
Selected degradation reactions in polyethylene irradiated with Ar and Xe ions.
Radiation Physics and Chemistry. Roč. 58, - (2000), s. 153-156. ISSN 0969-806X. E-ISSN 1879-0895
Institutional research plan: CEZ:AV0Z1048901
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 0.565, year: 2000

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.
Permanent Link: http://hdl.handle.net/11104/0081464