Caractérisation physico-mécanique d’un composite bois polymère

Abstract : This study follow others that propose a solution for the recovery of plastic waste and wood to make it a construction material made of wood-polymer composite. The particularity of this research is that the thermoplastic matrix used is a set of different polymers taken in well-defined proportions. The percentages considered for the matrix obtained represent the proportion of polymer waste that can be found in the city of Cotonou (Benin Republic). This study consisted in making WPC polymer wood composite samples by extrusion, studying them through physico-mechanical tests and relating them to samples made with an already existing artisanal method. On the one hand, we studied separately the sawdust and the thermoplastic matrix by determining the chemical constituents of the sawdust, and by performing a physico-mechanical analysis (thermogravimetric analysis, compression and tensile bending test, facies analysis). SEM fracture) on the reinforcement and the matrix. On the other hand we evaluated the influence of the addition of 20%, 25%, 28% and 30% of sawdust on the mechanical properties (compression, bending and traction). The results show that sawdust behaves like a reinforcement when the sample is stressed in compression and bending. Sawdust acts as a load when WPC samples are stressed in tension. Sawdust also improves the rigidity of WPC in tension. The mechanical results obtained by extrusion are much better than those resulting from the artisanal methods. Thermogravimetric analyzes performed on WPC samples from the artisanal method reveal that during their manufacture, these samples are subjected to temperatures (above 300 ° C) that begin the degradation of polymers and sawdust in WPC
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Theses
File URL :
http://docnum.univ-lorraine.fr/ulprive/DDOC_T_2017_0229_GUIDIGO.pdf
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https://hal.univ-lorraine.fr/tel-01907728
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Submitted on : Monday, October 29, 2018 - 2:19:37 PM
Last modification on : Wednesday, January 23, 2019 - 9:58:16 AM

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  • HAL Id : tel-01907728, version 1

Citation

Jonathan Guidigo. Caractérisation physico-mécanique d’un composite bois polymère. Science des matériaux [cond-mat.mtrl-sci]. Université de Lorraine; Université d'Abomey-Calavi (Bénin), 2017. Français. ⟨NNT : 2017LORR0229⟩. ⟨tel-01907728⟩

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