Lima, V. ; Hossain, U. H. ; Walbert, T. ; Seidl, T. ; Ensinger, W. (2018)
Mass spectrometric comparison of swift heavy ion-induced and anaerobic thermal degradation of polymers.
In: Radiation Physics and Chemistry, 144
doi: 10.1016/j.radphyschem.2017.10.024
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The study of polymers irradiated by highly energetic ions and the resulting radiation-induced degradation is of major importance for space and particle accelerator applications. The mechanism of ion-induced molecular fragmentation of polyethylene, polyethyleneimine and polyamide was investigated by means of mass spectrometry and infrared spectroscopy. The results show that the introduction of nitrogen and oxygen into the polymer influences the stability rendering aliphatic polymers with heteroatoms less stable. A comparison to thermal decomposition data from literature reveals that ion-induced degradation is different in its bond fracture mechanism. While thermal degradation starts at the weakest bond, which is usually the carbon-heteroatom bond, energetic ion irradiation leads in the first step to scission of all types of bonds creating smaller molecular fragments. This is due to the localized extreme energy input under non-equilibrium conditions when the ions transfer kinetic energy onto electrons. These findings are of relevance for the choice of polymers for long-term application in both space and accelerator facilities.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Lima, V. ; Hossain, U. H. ; Walbert, T. ; Seidl, T. ; Ensinger, W. |
| Art des Eintrags: | Bibliographie |
| Titel: | Mass spectrometric comparison of swift heavy ion-induced and anaerobic thermal degradation of polymers |
| Sprache: | Englisch |
| Publikationsjahr: | März 2018 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Radiation Physics and Chemistry |
| Jahrgang/Volume einer Zeitschrift: | 144 |
| DOI: | 10.1016/j.radphyschem.2017.10.024 |
| URL / URN: | https://doi.org/10.1016/j.radphyschem.2017.10.024 |
| Kurzbeschreibung (Abstract): | The study of polymers irradiated by highly energetic ions and the resulting radiation-induced degradation is of major importance for space and particle accelerator applications. The mechanism of ion-induced molecular fragmentation of polyethylene, polyethyleneimine and polyamide was investigated by means of mass spectrometry and infrared spectroscopy. The results show that the introduction of nitrogen and oxygen into the polymer influences the stability rendering aliphatic polymers with heteroatoms less stable. A comparison to thermal decomposition data from literature reveals that ion-induced degradation is different in its bond fracture mechanism. While thermal degradation starts at the weakest bond, which is usually the carbon-heteroatom bond, energetic ion irradiation leads in the first step to scission of all types of bonds creating smaller molecular fragments. This is due to the localized extreme energy input under non-equilibrium conditions when the ions transfer kinetic energy onto electrons. These findings are of relevance for the choice of polymers for long-term application in both space and accelerator facilities. |
| Freie Schlagworte: | Polymer Degradation, Heavy ion irradiation, Radiation damage, Thermal polymer degradation |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik |
| Hinterlegungsdatum: | 28 Dez 2017 09:49 |
| Letzte Änderung: | 02 Nov 2018 11:36 |
| PPN: | |
| Sponsoren: | We would like to thank the GSI for financial support. |
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