Effects of environmental aging in polypropylene obtained by injection molding
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2017
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INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY, 32nd
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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. PP has outstanding chemical and physical 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 lot of waste is generated at the end of their life cycle to the environment with low rate
degradation. This study has the objective 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 Mechanical Testing, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and Differential
Scanning Calorimetry (DSC). The dumbbell samples PP 20 kGy, after environmental aging, showed oxidation with presence of surface
cracks more intensely than the PP spheres neat.
Como referenciar
ROMANO, REBECA S.G.; OLIANI, WASHINGTON L.; PARRA, DUCLERC F.; LUGAO, ADEMAR B. Effects of environmental aging in polypropylene obtained by injection molding. In: MAAZOUZ, ABDERRAHIM (ed.). INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY, 32nd. Melville, NY: AIP Publishing, 2017. p. 140001-1 - 140001-5. (AIP Conference Proceedings 1914). Disponível em: http://repositorio.ipen.br/handle/123456789/28471. Acesso em: 19 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.