Accelerated ageing and lifetime prediction of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) in distilled water

Type Article
Date 2014-10
Language English
Author(s) Deroine Morgan1, Le Duigou Antoine1, Corre Yves-Marie1, Le Gac Pierre-YvesORCID2, Davies PeterORCID2, Cesar Guy3, Bruzaud Stephane1
Affiliation(s) 1 : Univ Bretagne Sud, LIMATB, EA 4250, F-56100 Lorient, France.
2 : IFREMER, Ctr Bretagne, Marine Struct Grp, F-29280 Plouzane, France.
3 : Univ Bretagne Sud, SERPBIO, F-56321 Lorient, France.
Source Polymer Testing (0142-9418) (Elsevier Sci Ltd), 2014-10 , Vol. 39 , P. 70-78
DOI 10.1016/j.polymertesting.2014.07.018
WOS© Times Cited 29
Keyword(s) Poly(3-hydroxybutyrate-co-3-hydroxyvalerate), Accelerated ageing, Hydrothermal degradation, Lifetime prediction
Abstract Accelerated ageing was performed in distilled water at different temperatures (25, 30, 40 and 50°C) on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), which is a biodegradable biopolymer, in order to estimate its lifetime in aqueous environment. In a first part, degradation mechanisms were followed by gravimetry, tensile tests and steric exclusion chromatography. Both immersion and relative humidity have been examined. In a second part, the strain at break was used as an indicator for lifetime prediction with an Arrhenius extrapolation. The study revealed the presence of only one irreversible degradation mechanism, i.e. hydrolytic degradation, which is temperature dependant. So, within the approach assumptions, the lifetime in distilled water of PHBV following Arrhenius behaviour can be predicted.
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