Discoloration Effects of High-Dose γ-Irradiation and Long-Term Thermal Aging of (U)HMW-PE
Joint Authors
Kömmling, Anja
Chatzigiannakis, Emmanouil
Beckmann, Jörg
Wachtendorf, Volker
von der Ehe, Kerstin
Braun, Ulrike
Jaunich, Matthias
Schade, Ulrich
Wolff, Dietmar
Source
International Journal of Polymer Science
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-09-06
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Two polyethylene types with ultra-high (UHMW-PE) and high molecular weight (HMW-PE) used as neutron radiation shielding materials in casks for radioactive waste were irradiated with doses up to 600 kGy using a 60Co gamma source.
Subsequently, thermal aging at 125°C was applied for up to one year.
Degradation effects in the materials were characterized using colorimetry, UV-Vis spectroscopy, IR spectroscopy, and DSC.
Both materials exhibited a yellowing upon irradiation.
The discoloration of UHMW-PE disappeared again after thermal aging.
Therefore, the yellowing is assumed to originate from annealable color centers in the form of free radicals that are trapped in the crystalline regions of the polymer and recombine at elevated temperatures.
For the antioxidant-containing HMW-PE, yellowing was observed after both irradiation and thermal aging.
The color change was correlated mainly to decomposition products of the antioxidant in addition to trapped radicals as in UHMW-PE.
Additionally, black spots appeared after thermal aging of HMW-PE.
American Psychological Association (APA)
Kömmling, Anja& Chatzigiannakis, Emmanouil& Beckmann, Jörg& Wachtendorf, Volker& von der Ehe, Kerstin& Braun, Ulrike…[et al.]. 2017. Discoloration Effects of High-Dose γ-Irradiation and Long-Term Thermal Aging of (U)HMW-PE. International Journal of Polymer Science،Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1168808
Modern Language Association (MLA)
Kömmling, Anja…[et al.]. Discoloration Effects of High-Dose γ-Irradiation and Long-Term Thermal Aging of (U)HMW-PE. International Journal of Polymer Science No. 2017 (2017), pp.1-10.
https://search.emarefa.net/detail/BIM-1168808
American Medical Association (AMA)
Kömmling, Anja& Chatzigiannakis, Emmanouil& Beckmann, Jörg& Wachtendorf, Volker& von der Ehe, Kerstin& Braun, Ulrike…[et al.]. Discoloration Effects of High-Dose γ-Irradiation and Long-Term Thermal Aging of (U)HMW-PE. International Journal of Polymer Science. 2017. Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1168808
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1168808