Studies on the effects of Fe3O4-PbO combinations in peroxide vulcanisation of EPDM and shielding 59.54 kev gamma rays

This research work presents the preparation of ethylene-propylene-diene-monomer (EPDM) composites filled with different concentrations of lead oxide (PbO) and magnetite (Fe 3 O 4 ). The catalytic role of Fe 3 O 4 on peroxide vulcanisation was studied. The morphological studies were done by the FESEM...

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Bibliographic Details
Published in:Radiation effects and defects in solids 2021-07, Vol.176 (7-8), p.690-703
Main Authors: Kamat, Vinayak Anand, Swaroop, K., Kiran, K. U., Eshwarappa, K. M., Somashekarappa, H. M.
Format: Article
Language:English
Subjects:
activation energy
Attenuation coefficients
Composite materials
Gamma rays
Iron oxides
Lead oxides
MCNP
Polymer composites
Propylene
Radiation shielding
Thermal stability
Thickness
Vulcanization
XCOM
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Summary:This research work presents the preparation of ethylene-propylene-diene-monomer (EPDM) composites filled with different concentrations of lead oxide (PbO) and magnetite (Fe 3 O 4 ). The catalytic role of Fe 3 O 4 on peroxide vulcanisation was studied. The morphological studies were done by the FESEM analysis. The evaluation of gamma shielding ability of synthesised composites was done for 59.54 keV gamma rays using a gamma spectrometer. Various shielding parameters, such as percentage attenuation (% Att ), linear attenuation coefficient (μ), relaxation length (λ), half value (HVL) and tenth value layer (TVL) thickness, were evaluated for synthesised composites. The obtained results showed that, the shielding ability of the synthesised composites increases with an increase in PbO concentration. Also, the thermal stability of the synthesised composites was studied by TGA and it was found that thermal stability of the synthesised composites decreases with an increase in PbO concentration. Thus by comparing the results of radiation shielding ability and thermal stability, EPDM, with 40 phr PbO and 20 phr Fe 3 O 4, can be considered as an ideal shielding material among the synthesised composites.
ISSN:1042-0150
1029-4953
DOI:10.1080/10420150.2021.1935942