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Développement de systèmes retardateurs de flamme pour matériaux composites thermoplastiques à fibres continues

Abstract : The present demand of polymer-matrix composite materials in the transport market is significantly increasing, to replace the work-pieces actually manufactured in metal alloys, the polymer-matrix composite being lighter and more performant. Thermoset composites are currently and widely used however this kind of composites presents a severe drawback due to their non- recyclable character. One of the objectives of the “Résines idéales” project and of this thesis is to develop new composites made from thermoplastic matrix, endowed with similar properties. Among them, the fire behavior is a major challenge and the aim of this work is to develop new flame retardant systems for thermoplastics composites reinforced with continuous fibers. Firstly, we have performed a screening of potentially effective phosphorus flame retardants. Also, we have studied the influence of the reinforcement taffetas on the thermal stability and fire behavior. For that, various tests have been performed such as cone calorimeter, LOI and UL-94. Then, to improve the fire behavior and particularly to satisfy the aeronautical fire standards (the most challenging), we have studied binary and ternary mixtures of flame retardants constituted by the selected phosphorus flame retardant and other additives: alumina, aluminum hydroxide (ATH), expanded graphite and 9,10-dihydro-9-oxy-10-phosphaphenanthrene-10-oxide (DOPO). In each case, the thermal stability and fire behavior have been characterized and discussed
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Submitted on : Thursday, October 1, 2020 - 9:38:06 AM
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Qing Lin. Développement de systèmes retardateurs de flamme pour matériaux composites thermoplastiques à fibres continues. Autre. Université de Lorraine, 2015. Français. ⟨NNT : 2015LORR0118⟩. ⟨tel-01751824⟩



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