Synthesis and radiation shielding properties of polyimide/Bi 2 O 3 composites.

Autor: Pavlenko VI; Institute of Chemical Technology, Radiation Monitoring Laboratory, Belgorod State Technological University Named After V.G. Shoukhov, Belgorod, 308012, Kostyukov str., 46, Russia., Cherkashina NI; Institute of Chemical Technology, Radiation Monitoring Laboratory, Belgorod State Technological University Named After V.G. Shoukhov, Belgorod, 308012, Kostyukov str., 46, Russia., Yastrebinsky RN; Institute of Chemical Technology, Radiation Monitoring Laboratory, Belgorod State Technological University Named After V.G. Shoukhov, Belgorod, 308012, Kostyukov str., 46, Russia.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2019 May 13; Vol. 5 (5), pp. e01703. Date of Electronic Publication: 2019 May 13 (Print Publication: 2019).
DOI: 10.1016/j.heliyon.2019.e01703
Abstrakt: Radiation shielding composites based on polyimide and Bi 2 O 3 were synthesized. Surface and physical-mechanical properties of polyimide/Bi 2 O 3 composites were studied. Bi 2 O 3 particles were modified by polymethylphenylsiloxane for the uniform distribution of filler in composites. This paper presents data on the production of composites in two ways: hot- and cold-pressing. The hot-pressing method for the synthesis of composites is preferable compared to the cold-pressing method (the density increases by 10-12%, and the Vickers microhardness by 10-20%). The results show that the introduction of Bi 2 O 3 significantly increases the thermal stability of the composites. At 680 °C, a polymer composite containing 10 wt% Bi 2 O 3 retains 9.7% of its mass, and at 60 wt% Bi 2 O 3 , retains 58.4%. The radiation-protective characteristics of the composites with respect to gamma radiation were evaluated by experimental and theoretical methods. High radiation-protective characteristics of the composites have been established in the gamma-quanta energy range of 0.1-1 MeV.
Databáze: MEDLINE
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