Effects of environmental aging in polypropylene obtained by injection molding
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2016
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BRAZILIAN MRS MEETING, 15th
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Resumo
UV light, heat, and pollutants can interact with Polypropylene (PP) molecules,
mainly with the tertiary carbon producing free radicals which can react with
oxygen producing changes in its properties [1]. PP has outstanding physical and
chemical properties, and a good processability at very low market price. In
addition, PP is extensively used for manufacturing various kinds of products,
however due to its large scale consumption a lor of waste is generated at the end
of their life cycle to the environment with low rate degradation [2]. This study has
the obejective of comparing the environmental exposure of PP (spheres) neat and
PP (spheres) irradiated with 20 kGy. Dumbbell samples were manufactured by
injection molding and exposed to the environment during 90 days. Another one
set was exposed to gamma irradiation at 20 kGy total dose and exposed at the
same conditions. The samples were characterized by Scanning Electron
Microscopy (SEM), Differential Scanning Calorimetry (DSC) and Fourier
Transform Infrared Spectroscopy (FTIR). The dumbbell samples PP 20 kGy, after
environmental aging, showed oxidation with presence of cracks more intensely
than PP spheres neat.
Como referenciar
ROMANO, REBECA G.; OLIANI, WASHINGTON L.; PARRA, DUCLERC F.; LUGAO, ADEMAR B. Effects of environmental aging in polypropylene obtained by injection molding. In: BRAZILIAN MRS MEETING, 15th, September 25-29, 2016, Campinas, SP. Abstract... p. 1903-1903. Disponível em: http://repositorio.ipen.br/handle/123456789/27550. Acesso em: 30 Dec 2025.
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.