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In-situ investigation of polyvinyl formal irradiated with GeV Au ions

Seidl, Tim and Baake, Olaf and Hossain, U. H. and Bender, M. and Severin, D. and Trautmann, C. and Ensinger, Wolfgang (2012):
In-situ investigation of polyvinyl formal irradiated with GeV Au ions.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier Science Publishing Company, pp. 400-404, 272, [Online-Edition: http://www.sciencedirect.com/science/article/pii/S0168583X11...],
[Article]

Abstract

Polyvinyl formal (Formvar®) foils were irradiated with 5.4 MeV/u Au ions and analysed in-situ by residual gas analysis and infrared spectroscopy. The experiment was performed at the new materials-research beamline (M-branch) at the universal linear accelerator of the GSI Helmholtz Centre in Darmstadt (Germany). Simultaneously analysing outgassing fragments and changes within the irradiated polymer film allows monitoring details of the degradation process. Ion-induced degradation of polyvinyl formal is characterized by fragmentation of side chains of the polymer backbone. The infrared spectra show the formation of unsaturated hydrocarbons and ketones. A possible degradation mechanism is proposed including the production of enols as reported earlier for degradation of polyvinyl alcohol exposed to gamma radiation.

Item Type: Article
Erschienen: 2012
Creators: Seidl, Tim and Baake, Olaf and Hossain, U. H. and Bender, M. and Severin, D. and Trautmann, C. and Ensinger, Wolfgang
Title: In-situ investigation of polyvinyl formal irradiated with GeV Au ions
Language: English
Abstract:

Polyvinyl formal (Formvar®) foils were irradiated with 5.4 MeV/u Au ions and analysed in-situ by residual gas analysis and infrared spectroscopy. The experiment was performed at the new materials-research beamline (M-branch) at the universal linear accelerator of the GSI Helmholtz Centre in Darmstadt (Germany). Simultaneously analysing outgassing fragments and changes within the irradiated polymer film allows monitoring details of the degradation process. Ion-induced degradation of polyvinyl formal is characterized by fragmentation of side chains of the polymer backbone. The infrared spectra show the formation of unsaturated hydrocarbons and ketones. A possible degradation mechanism is proposed including the production of enols as reported earlier for degradation of polyvinyl alcohol exposed to gamma radiation.

Journal or Publication Title: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Volume: 272
Publisher: Elsevier Science Publishing Company
Uncontrolled Keywords: Formvar, Polymer degradation, Polyvinyl formal, Radiolysis, Swift heavy ions
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 30 Dec 2011 08:28
Official URL: http://www.sciencedirect.com/science/article/pii/S0168583X11...
Additional Information:

Proceedings of the 17th International Conference on Ion Beam Modification of Materials (IBMM 2010)

Funders: Financial support from the Bundesministerium für Bildung und Forschung (BMBF), Germany, under Project No. 05KK7RD1 is acknowledged.
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