Hossain, Umme Habiba ; Seidl, Tim ; Ensinger, Wolfgang (2014)
Combined in situ infrared and mass spectrometric analysis of high-energy heavy ion induced degradation of polyvinyl polymers.
In: Polymer Chemistry, 5 (3)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Degradation of polyvinyl polymers (polyvinyl formal, polyvinyl alcohol, and polyvinyl acetate) by high-energy heavy ions was analysed with in situ mass spectrometry and infrared spectroscopy. Both at room temperature and at cryogenic temperature, the polymers are severely damaged by scission of side chains and the polymer backbone, releasing a large number of molecular fragments. Correlation of structural analysis of the damaged polymer and mass analysis of its volatile fragments gives plausible reaction mechanisms for the ion induced degradation. These are compared to thermal degradation. The differences found between the two degradation processes are due to the non-equilibrium character of the ion based process with its high electronic excitation and ionisation. The results are of practical relevance for applications of the polymers in devices of particle accelerators and space vehicles.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Hossain, Umme Habiba ; Seidl, Tim ; Ensinger, Wolfgang |
| Art des Eintrags: | Bibliographie |
| Titel: | Combined in situ infrared and mass spectrometric analysis of high-energy heavy ion induced degradation of polyvinyl polymers |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2014 |
| Verlag: | Royal Society of Chemistry Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Polymer Chemistry |
| Jahrgang/Volume einer Zeitschrift: | 5 |
| (Heft-)Nummer: | 3 |
| URL / URN: | http://pubs.rsc.org/en/content/articlelanding/2014/py/c3py01... |
| Kurzbeschreibung (Abstract): | Degradation of polyvinyl polymers (polyvinyl formal, polyvinyl alcohol, and polyvinyl acetate) by high-energy heavy ions was analysed with in situ mass spectrometry and infrared spectroscopy. Both at room temperature and at cryogenic temperature, the polymers are severely damaged by scission of side chains and the polymer backbone, releasing a large number of molecular fragments. Correlation of structural analysis of the damaged polymer and mass analysis of its volatile fragments gives plausible reaction mechanisms for the ion induced degradation. These are compared to thermal degradation. The differences found between the two degradation processes are due to the non-equilibrium character of the ion based process with its high electronic excitation and ionisation. The results are of practical relevance for applications of the polymers in devices of particle accelerators and space vehicles. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 02 Jan 2014 11:11 |
| Letzte Änderung: | 31 Jan 2014 10:00 |
| PPN: | |
| Sponsoren: | This work was supported by the Bundesministerium für Bildung und Forschung (BMBF), Germany, under Project no. 05P09RDRB0 (PT-DESY). |
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