Accesso libero

GC investigation of post-irradiation oxidation phenomena on polypropylene

Wojciech Głuszewski
Wojciech Głuszewski
   | 25 nov 2021
Nukleonika's Cover Image
INFORMAZIONI SU QUESTO ARTICOLO
Articolo precedente
Articolo Successivo
Cita
Article Category: Original Paper
Pubblicato online: 25 nov 2021
Pagine: 187 - 192
Ricevuto: 20 ott 2020
Accettato: 17 feb 2021
DOI: https://doi.org/10.2478/nuka-2021-0027
Parole chiave
© 2021 Wojciech Głuszewski, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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)

Addition GH2 GO2 GCO (μmol/J) GO2 GCO
0.5 h 24 h
PP 0.377 −0.558 0.033 −0.609 0.100
Anthracene 0.299 −0.521 0.030 −0.608 0.063
Fluoranthene 0.274 −0.492 0.026 −0.584 0.059
Acenaphthene 0.263 −0.529 0.005 −0.610 0.017
Pyrene 0.215 −0.525 0.015 −0.603 0.051
Naphthalene 0.270 −0.431 0.012 −0.565 0.023

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

Polymer % PS Protective range (mers)
GH2 GCO GCH4 GO2 H2 CO CH4 O2
A 25 20 25 30 7 10 7 6
B 15 8 8 − 14 28 28 −
C 10 11 15 15 22 20 14 14
eISSN:
1508-5791
Lingua:
Inglese
Frequenza di pubblicazione:
4 volte all'anno
Argomenti della rivista:
Chemistry, Nuclear Chemistry, Physics, Astronomy and Astrophysics, other
Feed RSS della rivista