Durabilité de produits innovants de robinetterie en polyamide 6,6

Abstract : PA 6,6 is now considered for the elaboration of valve parts in the domestic network of drinking water distribution. However, this material will be used only if its long-term durability, in real use conditions, is clearly demonstrated. The kinetic analysis of the main chemical ageing mechanisms which may occur and interact in the domestic network of drinking water distribution: hydrolysis, thermal oxidation and chemical attack by chlorine dioxide, has allowed to finally build a general kinetic model for PA 6,6 degradation. This model gives access to PA 6,6 structural modifications at the different pertinent scales (molecular, macromolecular, morphological and macroscopic scales) in use conditions. It predicts the embrittlement of PA 6,6 when the number average molar mass reaches a critical value of the order of 17 kg/mole. Many research prospects are presented such as the introduction of this kinetic model in common mechanical calculation codes.
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Chaker El Mazry. Durabilité de produits innovants de robinetterie en polyamide 6,6. Autre. Ecole nationale supérieure d'arts et métiers - ENSAM, 2013. Français. ⟨NNT : 2013ENAM0003⟩. ⟨pastel-00871827⟩

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