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Mise en oeuvre et propriétés mécaniques, thermiques et de tenue au feu de filaments à base de polypropylène chargé en nanoparticules

Abstract : The french textile industry meets stiff competition. The firms try to differentiate themselves by improving or adding new properties to their products. The cost remaining a major concern, PP, polymer with an interesting compromise cost / ownership, is therefore widely used. Different ways exist to functionalize this polymer. One of them is to add fillers. However, the size and rate of particles commonly added to achieve satisfactory properties cause difficulties during the melt spinning process. Due to their characteristics (size and filler rate), nanoparticles offer an interesting alternative to explore. Blends PP / Clay were prepared with a twin-screw extruder before being spun. A strong decrease in the elongation properties of filaments in the presence of clay, probably due to its low exfoliation, brings us to consider the preparation of ternary blends (PP / PA-6 / Clay). However, it was not possible to spin these blends for a filler rate higher than 1 wt% due to their specific morphologies. Filaments of PP filled with clay and graphite and filaments of PP filled with based manganese nanoparticles have also been produced to assess their mechanical and thermal properties. Under air, thermal stability of PP has been improved with all tested fillers. And finally, the filaments made were used to produce knitted fabrics, whose fire properties have been studied with a cone calorimeter
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Submitted on : Tuesday, November 17, 2020 - 1:32:02 PM
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  • HAL Id : tel-03009706, version 1

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François Rault. Mise en oeuvre et propriétés mécaniques, thermiques et de tenue au feu de filaments à base de polypropylène chargé en nanoparticules. Mécanique des matériaux [physics.class-ph]. Université de Valenciennes et du Hainaut-Cambrésis, 2008. Français. ⟨NNT : 2008VALE0015⟩. ⟨tel-03009706⟩

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