Comparison of beta and neutron attenuations of poly(imide siloxane) block copolymers for medical applications

Beta and neutron attenuations of poly(imide siloxane) block copolymers were compared to evaluate radiation penetrations into flexible sheet (BI) and pellet form BII grains. The modification of BII polymer has improved its radiation shielding properties of poly(imide siloxane) block copolymer as the...

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Bibliographic Details
Published in:International journal of polymeric materials 2020-09, Vol.69 (13), p.831-839
Main Authors: Dogan, Turkan, Baydogan, Nilgun
Format: Article
Language:English
Subjects:
Attenuation coefficients
Beta particles
Beta rays
Block copolymers
Copolymers
Grains
neutrons
poly(imide) siloxane
radiation
Radiation shielding
Siloxanes
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Summary:Beta and neutron attenuations of poly(imide siloxane) block copolymers were compared to evaluate radiation penetrations into flexible sheet (BI) and pellet form BII grains. The modification of BII polymer has improved its radiation shielding properties of poly(imide siloxane) block copolymer as the result of the pelletization. The linear attenuation coefficient of BII sample was determined as ∼0.073 (1/cm) and the half value layer was at ∼9.5 cm for negative beta particles. Besides, the total macroscopic cross section was at 0.047 (1/cm) and the half value layer of BII sample was determined at 14.74 cm for neutrons. The variations of beta and neutron attenuations indicated the structural changes in the poly(imide siloxane) block copolymer depended on the critical production parameters at the production step. The pelletization of the grains of BII improved beta and neutron shielding properties of poly(imide siloxane) block copolymers for the use in medical applications.
ISSN:0091-4037
1563-535X
DOI:10.1080/00914037.2019.1616204