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Limits in the validity of Arrhenius predictions for field ageing of a silica filled polychloroprene in a marine environment 5
Le Saux, V.; Le Gac, Pierre-yves; Marco, Y.; Calloch, S..
Accelerated ageing in natural sea water at different temperatures from 20°C to 80°C was performed on a silica filled polychloroprene rubber. Degradation when monitored with mechanical properties at both macroscopic and microscopic scale led to a large increase of the modulus coupled with a strong decrease of strain and stress at break. Data from tensile tests were used for lifetime prediction with an Arrhenius extrapolation for modulus, strain and stress at break. The validity of this lifetime prediction was evaluated using a 23 year-old sample aged in natural conditions. Strain at break could be predicted using an Arrhenius extrapolation with an activation energy of 50 kJ/mol. However, an extrapolation based on linear Arrhenius behavior did not apply for...
Tipo: Text Palavras-chave: Polychloroprene rubber; Accelerated and natural ageing tests; Arrhenius extrapolation; Lifetime prediction; Sea water.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00164/27523/25679.pdf
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