Influence du vieillissement sur le comportement au feu de formulations hétérophasées ignifugées

Abstract : The fire behaviour of polymeric materials can be modified after ageing, possibly leading to severe damages. These modifications depend on the chemical nature of the system (polymeric matrix, flame retardant system) and on the ageing conditions. Currently, norms exist, that define fire properties of fresh flame-retarded materials; but only few studies have been performed on aged materials. The aim of this work consists in evaluating the impact of ageing of flame-retarded materials. Firstly, materials have been processed from various formulations. The study focused on poly(methyl methacrylate) (PMMA) and poly(lactic acid) (PLA) polymers; flame-retardant system combining a phosphorus compound and mineral nanoparticles was added. Then an operating procedure has been created to simulate ageing, and a methodology has been developed to assess the characteristics of the composites before and after ageing (viscosity, morphology, fire behaviour). Finally, the combustion aerosols emitted by unaged and aged formulations have been investigated
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https://hal.univ-lorraine.fr/tel-02096922
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Rémy Mangin. Influence du vieillissement sur le comportement au feu de formulations hétérophasées ignifugées. Matériaux. Université de Lorraine, 2018. Français. ⟨NNT : 2018LORR0216⟩. ⟨tel-02096922⟩

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