Degradation of electron-irradiated polyethylene studied by positron annihilation lifetime spectroscopy

14th International Workshop on Slow Positron Beam Techniques & Applications

Onodera, K.^1 ; Oka, T.^1,2 ; Kino, Y.^1 ; Sekine, T.^1,2

Department of Chemistry, Tohoku University, Miyagi, Sendai

980-8578, Japan^1

Institute for Excellence in Higher Education, Tohoku University, Miyagi, Sendai

980-8576, Japan^2

关键词: Gel fraction measurement;    Long-term storage;    Micro-FTIR;    Positron annihilation lifetime spectroscopy;    Post-oxidation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/791/1/012026/pdf
DOI  :  10.1088/1742-6596/791/1/012026

来源: IOP

【 摘 要 】

Degradation of electron beam irradiated high-density polyethylene was studied by positron annihilation lifetime spectroscopy (PALS), micro-FT-IR, and gel fraction measurements. The obtained results indicated that ortho-positronium intensity is influenced not only by the irradiation but also the post oxidation, which illustrates that PALS may be a promising tool to monitor/evaluate the degradation of polyethylene induced by irradiation and long-term storage.