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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 Głuszewski  
Open Access
|Nov 2021

Figures & Tables

Fig. 1

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.

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.

Fig. 4

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 .

Fig. 6

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.

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.

Fig. 9

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).

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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