Electron beam irradiation process applied to primary and secondary recycled high density polyethylene
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2017
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Resumo
Plastic bags, packaging and furniture items are examples of plastic utilities always present in life. However, the
end-of-life of plastics impacts the environment because of this ubiquity and also often their high degradation
time. Recycling processes are important in this scenario because they offer many solutions to this problem.
Basically, four ways are known for plastic recycling: primary recycling, which consists in re-extrusion of clean
plastic scraps from a production plant; secondary recycling, that uses end-of-life products that generally are
reduced in size by extrusion to obtain a more desirable shape for reprocessing (pellets and powder); tertiary
recover which is related to thermo-chemical methods to produce fuels and petrochemical feedstock; and
quaternary route, that is related to energy recovery and it is done in appropriate reactors. In this work, high
density polyethylene (HDPE) was recovered to simulate empirically the primary and secondary recycling ways
using materials which ranged from pristine to 20-fold re-extrused materials. The final 20-fold recycled
thermoplastic was irradiated in an electron beam accelerator under a dose rate of 22.4 kGy/s and absorbed doses
of 50 kGy and 100 kGy. The characterization of HDPE in distinct levels of recovering was performed by
infrared spectroscopy (FTIR) and thermogravimetric degradation. In the HDPE recycling, degradation and
crosslinking are consecutive processes; degradation is very noticeable in the 20-fold recycled product. Despite
this, the 20-fold recycled product presents crosslinking after irradiation process and the post-irradiation
product presents similarities in spectroscopic and thermal degradation characteristics of pristine, irradiated
HDPE. These results are discussed.
Como referenciar
CARDOSO, JESSICA R.; MOURA, EDUARDO de; GERALDO, AUREA B.C. Electron beam irradiation process applied to primary and secondary recycled high density polyethylene. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28351. Acesso em: 21 May 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.