Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 2
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Impact of hydrolytic degradation on mechanical properties of PET - Towards an understanding of microplastics formation ArchiMer
Arhant, Mael; Le Gall, Maelenn; Le Gac, Pierre Yves; Davies, Peter.
Ocean pollution by microplastics, i.e. small pieces of plastic of less than 5 mm, is one of the major concerns for the future of our planet. Secondary microplastics formation is due to fragmentation of macroplastic waste. This fragmentation can be attributed to environmental loadings such as waves, winds and tides, coupled with a change in mechanical properties of polymers induced by UV and seawater ageing. This study aims to characterize and understand changes in the mechanical behaviour of Polyethylene Terephthalate (PET) induced by hydrolysis, especially for high degradation levels. Thin films (200 microns) of PET were aged in water at temperatures from 110 °C to 80 °C for up to 150 days. Embrittlement occurs with chain scission during hydrolysis when...
Tipo: Text Palavras-chave: Hydrolysis; Polyethylene terephthalate; Mechanical properties; Molar mass; Embrittlement; Microplastics.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00476/58794/61331.pdf
Imagem não selecionada

Imprime registro no formato completo
Impact of fillers (short glass fibers and rubber) on the hydrolysis-induced embrittlement of polyamide 6.6 ArchiMer
Le Gac, Pierre Yves; Fayolle, Bruno.
This study deals with the durability of composites based on polyamide 6.6 (PA6.6) in a humid environment, and more especially, with the loss of fracture properties. It is known that PA6.6 undergoes plasticization in the presence of water, but hydrolysis also occurs. This hydrolysis leads to a sharp decline in fracture properties in resin. The aim of this study is thus to understand the behavior of two PA6.6-based composites, one containing short glass fibers and the other both glass fibers and a rubber. The results showed the transition from ductile to brittle behavior as a function of hydrolysis time in resin. For composites, the drop in elongation breaking with the macromolecular chain length was linear for all ageing conditions considered here without...
Tipo: Text Palavras-chave: Polyamide 6.6; Hydrolysis; Fracture; Embrittlement; Reinforced plastics.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00450/56197/57755.pdf
Registros recuperados: 2
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional