Data/hora: 01/06/2024 14:45:53

Provedor de dados: | 5
País: | France
Título: | Impact of hydrolytic degradation on mechanical properties of PET - Towards an understanding of microplastics formation
Autores: | Arhant, Mael; Le Gall, Maelenn; Le Gac, Pierre Yves; Davies, Peter.
Data: | 2019-03
Ano: | 2019
Palavras-chave: | Hydrolysis; Polyethylene terephthalate; Mechanical properties; Molar mass; Embrittlement; Microplastics.
Resumo: | 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 molar mass of the polymer falls below 17 kg/mol. When the polymer is brittle, i.e. for high levels of degradation, the stress at break decreases linearly with the molar mass, and can be described by a simple mathematical expression.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00476/58794/61331.pdf

DOI:10.1016/j.polymdegradstab.2019.01.021

https://archimer.ifremer.fr/doc/00476/58794/

Editor: | Elsevier BV
Formato: | application/pdf
Fonte: | Polymer Degradation And Stability (0141-3910) (Elsevier BV), 2019-03 , Vol. 161 , P. 175-182

Fonte:

info:eu-repo/semantics/openAccess

restricted use