Yield stress changes induced by water in polyamide 6: Characterization and modeling

Type Article
Date 2017-03
Language English
Author(s) Le Gac Pierre-YvesORCID1, Arhant Mael1, Le Gall Maelenn1, Davies PeterORCID1
Affiliation(s) 1 : IFREMER, Ctr Bretagne, Marine Struct Lab, F-29280 Plouzane, France.
Source Polymer Degradation And Stability (0141-3910) (Elsevier Sci Ltd), 2017-03 , Vol. 137 , P. 272-280
DOI 10.1016/j.polymdegradstab.2017.02.003
WOS© Times Cited 29
Keyword(s) Yield stress, Water, Polyamide, Plasticization, Prediction
Abstract This paper considers the effect of water content on mechanical properties of polyamide 6 when used in a humid environment. First an experimental section presents the tensile behavior of polyamide with different amounts of water, with and without a through-thickness water gradient. Water profiles are introduced by immersion in sea water at 25 °C. The effect of testing temperature is also investigated in order to consider the influence of macromolecular chain mobility on the mechanical behavior. Then, in a second section, modelling of yield stress is proposed based on physical considerations. This can be used for life time prediction of PA6 in humid environment when plasticization is the main degradation mechanism.
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