Butyl rubber recycling by means of gamma radiation followed by mechanical shear
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2018
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International Journal of Waste Resources
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Resumo
Polymeric materials (plastics and rubbers) cover a continuously raising proportion of urban and industrial solid wastes
discarded in landfills and consequently their impact on environment are more and more concern. Rubbers exhibit
a very slow natural decomposition due to their chemical structure weather resistant as well to enzymatic degradation and
to microorganisms. Rubber recovering is hampered by its insolubility caused by crosslinked structures. Besides, this
tridimensional structure causes various problems for material recovering and reprocessing. Just 8% to 12% of polymeric
residues are thermoplastic polymers; remaining are elastomers especially post consumption tires. It is relevant to emphasize
that the crosslinking is essential for practical use of rubber and this process is worldwide known as vulcanizing process,
discovered by North American Charles Goodyear. The implementation of new technologies in order to reduce polymeric
residues, acceptable from the environmental viewpoint and at an effective cost proved to be a great problem due to inherent
complexities for polymers reuse. Ionizing radiation has capacity to change structure and properties of polymeric materials.
Butyl rubbers have been used in wide scale within a variety of applications such as tires spare-parts and diverse artifacts. Major
effect of high energy photon, such as gamma rays in butyl and halo-butyl rubbers is the creation of free radicals accompanied by
changes in mechanical properties. This work aims to the development of processes of controlled degradation (de-vulcanizing)
of butyl rubber in order to characterize their availability for modification and changes of their properties. Experimental results
obtained showed that butyl rubbers irradiated at 25 kGy and further sheared can be used as the starting point for mixtures
with pristine rubber.
Como referenciar
SCAGLIUSI, SANDRA R.; CARDOSO, ELIZABETH C.L.; LUGAO, ADEMAR B. Butyl rubber recycling by means of gamma radiation followed by mechanical shear. International Journal of Waste Resources, v. 8, p. 53-54, 2018. DOI: 10.4172/2252-5211-C1-011. Disponível em: http://repositorio.ipen.br/handle/123456789/30538. Acesso em: 20 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.