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GC investigation of post-irradiation oxidation phenomena on polypropylene Cover

GC investigation of post-irradiation oxidation phenomena on polypropylene

Nukleonika
Volume 66 (2021): Issue 4 (December 2021)
By: Wojciech GłuszewskiORCID  
Open Access
|Nov 2021

Figures & Tables

Fig. 1

Radiation yields of H2, O2, and CO in the function post-irradiation time (PP) [7].
Radiation yields of H2, O2, and CO in the function post-irradiation time (PP) [7].

Fig. 2

LAE 13/9 electron accelerator in the setting for direct beam irradiation. Bottle with a PP sample on the background of the accelerator window.
LAE 13/9 electron accelerator in the setting for direct beam irradiation. Bottle with a PP sample on the background of the accelerator window.

Fig. 3

Sample chromatogram of PP radiolysis products. The figure shows the retention times and the area under the peaks in relative units next to the peaks.
Sample chromatogram of PP radiolysis products. The figure shows the retention times and the area under the peaks in relative units next to the peaks.

Fig. 4

Dependence of the radiation efficiency of hydrogen evolution on the PS content in the PP/PS blend “B”.
Dependence of the radiation efficiency of hydrogen evolution on the PS content in the PP/PS blend “B”.

Fig. 5

Dependence of the radiation efficiency of oxygen absorption on the content of PS in the PP/PS blend “B.” Irradiation was carried out at room temperature and liquid nitrogen .
Dependence of the radiation efficiency of oxygen absorption on the content of PS in the PP/PS blend “B.” Irradiation was carried out at room temperature and liquid nitrogen .

Fig. 6

Yields of post-radiation oxidation of PP, irradiated at room temperature and liquid nitrogen temperature ( −196°C, +22°C). Dose 28 kGy.
Yields of post-radiation oxidation of PP, irradiated at room temperature and liquid nitrogen temperature ( −196°C, +22°C). Dose 28 kGy.

Fig. 7

Time dependence of the post-radiation efficiency of hydrogen evolution.
Time dependence of the post-radiation efficiency of hydrogen evolution.

Fig. 8

Radiation performance of oxygen absorption by PP and PP/PS (“A”) compositions during irradiation and after irradiation. The bottle was not opened after irradiation. Dose 10 kGy.
Radiation performance of oxygen absorption by PP and PP/PS (“A”) compositions during irradiation and after irradiation. The bottle was not opened after irradiation. Dose 10 kGy.

Fig. 9

Oxygen absorption efficiency in post-radiation processes (“A”). The irradiated bottles were opened and closed again after heating. Dose 10 kGy.
Oxygen absorption efficiency in post-radiation processes (“A”). The irradiated bottles were opened and closed again after heating. Dose 10 kGy.

Fig. 10

Relationships of radiation efficiency of gas products as a function of PET content (analyses carried out after irradiation and after 24 h).
Relationships of radiation efficiency of gas products as a function of PET content (analyses carried out after irradiation and after 24 h).

Yields (G) of gaseous products in radiolysis of PP powder soaked with solutions of aromatic compounds_ Analyses were made after irradiation (0_5 h) and after 24 hours (24 h)

AdditionGH2GO2GCO (μmol/J)GO2GCO
0.5 h24 h
PP0.377−0.5580.033−0.6090.100
Anthracene0.299−0.5210.030−0.6080.063
Fluoranthene0.274−0.4920.026−0.5840.059
Acenaphthene0.263−0.5290.005−0.6100.017
Pyrene0.215−0.5250.015−0.6030.051
Naphthalene0.270−0.4310.012−0.5650.023

Estimation of the protective range of PS in the radiolysis of PP for samples: A, B, C

Polymer% PSProtective range (mers)
GH2GCOGCH4GO2H2COCH4O2
A2520253071076
B1588−142828−
C1011151522201414
DOI: https://doi.org/10.2478/nuka-2021-0027 | Journal eISSN: 1508-5791 | Journal ISSN: 0029-5922
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Language: English
Page range: 187 - 192
Submitted on: Oct 20, 2020
Accepted on: Feb 17, 2021
Published on: Nov 25, 2021
Published by: Institute of Nuclear Chemistry and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Gas chromatography,
Polypropylene,
Post-radiation oxidation,
Protective effect,
Radiolysis
Related subjects:
Chemistry,
Nuclear chemistry,
Physics,
Astronomy and astrophysics,
Physics, other

© 2021 Wojciech Głuszewski, published by Institute of Nuclear Chemistry and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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