Emission of volatile degradation products from polymers irradiated with heavy ions to different fluences.
Result description
Polyimide (Upilex), polyethyleneterephtalate, polystyrene and polyethylene were irradiated with 20-200 KeV C+, N+, F+, Ar and Xe+ ions to the fluences up to 10(17)cm(-2) and the depth profiles of hydrogen and oxygen atoms in the polymer surface layer were determined using standard Rutherford Back-Scattering (RBS) and Elastic Recoil Detection (ERD) techniques. The H and O depth profiles are structureless with no local extremes and with the concentration monotonically increasing from the sample surface tothe bulk value typical for pristine polymer. The H and O contents in the irradiated surface layer remain unchanged up to a criticll fluence, which is a decrasing function of the energy density deposited by an ion. Then they decline rather rapidly and converge to 50-70% of their original values of unirradiated polymer. The decline rate is roughly the same for all ion/polymer combinations regardless of the ion mass and energy.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Emission of volatile degradation products from polymers irradiated with heavy ions to different fluences.
Original language description
Polyimide (Upilex), polyethyleneterephtalate, polystyrene and polyethylene were irradiated with 20-200 KeV C+, N+, F+, Ar and Xe+ ions to the fluences up to 10(17)cm(-2) and the depth profiles of hydrogen and oxygen atoms in the polymer surface layer were determined using standard Rutherford Back-Scattering (RBS) and Elastic Recoil Detection (ERD) techniques. The H and O depth profiles are structureless with no local extremes and with the concentration monotonically increasing from the sample surface tothe bulk value typical for pristine polymer. The H and O contents in the irradiated surface layer remain unchanged up to a criticll fluence, which is a decrasing function of the energy density deposited by an ion. Then they decline rather rapidly and converge to 50-70% of their original values of unirradiated polymer. The decline rate is roughly the same for all ion/polymer combinations regardless of the ion mass and energy.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Result continuities
Project
GA203/99/1626: Polymers modified by ion beams for tissue engineering
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2002
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Radiation effects and defects in solid
ISSN
1042-0150
e-ISSN
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Volume of the periodical
155
Issue of the periodical within the volume
1-4
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
195-202
UT code for WoS article
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EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BG - Nuclear, atomic and molecular physics, accelerators
Year of implementation
2002