TU Darmstadt / ULB / TUbiblio

Mass spectrometric comparison of swift heavy ion-induced and anaerobic thermal degradation of polymers

Lima, V. and Hossain, U. H. and Walbert, T. and Seidl, T. and Ensinger, W. (2018):
Mass spectrometric comparison of swift heavy ion-induced and anaerobic thermal degradation of polymers.
In: Radiation Physics and Chemistry, Elsevier Science Publishing, pp. 21-28, 144, ISSN 0969806X,
DOI: 10.1016/j.radphyschem.2017.10.024,
[Online-Edition: https://doi.org/10.1016/j.radphyschem.2017.10.024],
[Article]

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.

Item Type: Article
Erschienen: 2018
Creators: Lima, V. and Hossain, U. H. and Walbert, T. and Seidl, T. and Ensinger, W.
Title: Mass spectrometric comparison of swift heavy ion-induced and anaerobic thermal degradation of polymers
Language: English
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.

Journal or Publication Title: Radiation Physics and Chemistry
Volume: 144
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Polymer Degradation, Heavy ion irradiation, Radiation damage, Thermal polymer degradation
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
Date Deposited: 28 Dec 2017 09:49
DOI: 10.1016/j.radphyschem.2017.10.024
Official URL: https://doi.org/10.1016/j.radphyschem.2017.10.024
Funders: We would like to thank the GSI for financial support.
Export:

Optionen (nur für Redakteure)

View Item View Item