Radiation effects on crosslinking of butyl rubber compounds
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2019
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Acta Scientific Microbiology
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When butyl rubbers are subjected to high energy radiation, they form easy free radicals that initiate various chemical reactions.
These reactions alter the molecular distribution of irradiated rubbers by crosslinking or scission affect their physical and mechanical
properties. This work aims to the analysis of effect induced by γ-exposure on the crosslinking density in butyl rubbers by swelling
measurements accomplished before and after irradiation at 25, 50, 100 and 200 kGy, with further evaluation of crosslinking density
accomplished by Flory-Rehner equation; this is a proper procedure for the qualification of radiation resistance. It can be noticed that
changes in material structure was due to build-up of new three-dimensional network in studied rubbers. Changes in crosslinking
density of butyl rubber compounds emphasize that degradation mechanism is strongly influenced by gamma-radiation doses higher
than 50 kGy, since chain scission process predominates over crosslinking reaction.
Como referenciar
SCAGLIUSI, SANDRA R.; CARDOSO, ELISABETH C.L.; LUGAO, ADEMAR B. Radiation effects on crosslinking of butyl rubber compounds. Acta Scientific Microbiology, v. 2, n. 9, p. 160-164, 2019. DOI: 10.31080/ASMI.2019.02.0356. Disponível em: http://repositorio.ipen.br/handle/123456789/30857. Acesso em: 18 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.