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

作者：Deroine Morgan; Le Duigou Antoine; Corre Yves Marie; Le Gac Pierre Yves; Davies Peter; Cesar Guy; Bruzaud Stephane^*

来源：Polymer Testing, 2014, 39: 70-78.

DOI：10.1016/j.polymertesting.2014.07.018

• Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
• Accelerated ageing
• Hydrothermal degradation
• Lifetime prediction

Accelerated ageing was performed in distilled water at different temperatures (25, 30, 40 and 50 degrees 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.

• 出版日期2014-10