Data/hora: 07/06/2024 04:42:22

Provedor de dados: 	5	
País: 	France	
Título: 	Seawater accelerated ageing of poly(3-hydroxybutyrate-co-3-hydroxyvalerate	
Autores: 	Deroine, Morgan; Le Duigou, Antoine; Corre, Yves-marie; Le Gac, Pierre-yves; Davies, Peter; Cesar, Guy; Bruzaud, Stephane.	
Data: 	2014-07	
Ano: 	2014	
Palavras-chave: 	Poly(3-hydroxybutyrate-co-3-hydroxyvalerate); Accelerated ageing; Hydrothermal degradation; Seawater.	
Resumo: 	The aim of this study is to establish a baseline for poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) lifetime prediction in a marine environment, by means of mechanical and physico-chemical characterization of specimens immersed in continuously renewed and filtered natural seawater in the laboratory at different temperatures (4, 25 and 40°C). Samples were also aged at sea in Lorient harbour in order to compare laboratory and natural degradation mechanisms and kinetics. Due to its morphology, hydrolysis of PHBV in natural seawater is quite slow, and samples were observed to undergo preferentially an enzymatic surface degradation. Increasing the aging temperature in the laboratory promotes the water uptake and causes hydrolysis. As two degradation mechanisms occur in parallel, the choice of test conditions is critical, and the lifetime of PHBV in a marine environment is difficult to predict accurately.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00188/29972/28425.pdf

DOI:10.1016/j.polymdegradstab.2014.04.026	
Editor: 	Elsevier Sci Ltd	
Relação: 	http://archimer.ifremer.fr/doc/00188/29972/	
Formato: 	application/pdf	
Fonte: 	Polymer Degradation And Stability (0141-3910) (Elsevier Sci Ltd), 2014-07 , Vol. 105 , P. 237-247	
Fonte: 	2014 Elsevier Ltd. All rights reserved.