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Mechanical properties,wettability and thermal degradation of HDPE/birch fiber composite

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Koffi, A., Mijiyawa, F., Koffi, D., Erchiqui, F. et Toubal, L. (2021). Mechanical properties,wettability and thermal degradation of HDPE/birch fiber composite. Polymers, 13 (9). ISSN 2073-4360 DOI 10.3390/polym13091459

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Résumé

Wood-plastic composites have emerged and represent an alternative to conventional composites reinforced with synthetic carbon fiber or glass fiber-polymer. A wide variety of wood fibers are used in WPCs including birch fiber. Birch is a common hardwood tree that grows in cool areas such as the province of Quebec, Canada. The effect of the filler proportion on the mechanical properties, wettability, and thermal degradation of high-density polyethylene/birch fiber composite was studied. High-density polyethylene, birch fiber and maleic anhydride polyethylene as coupling agent were mixed and pressed to obtain test specimens. Tensile and flexural tests, scanning electron microscopy, dynamic mechanical analysis, differential scanning calorimetry, thermogravimetry analysis and surface energy measurement were carried out. The tensile elastic modulus increased by 210% as the fiber content reached 50% by weight while the flexural modulus increased by 236%. The water droplet contact angle always exceeded 90°, meaning that the material remained hydrophobic. The thermal decomposition mass loss increased proportional with the percentage of fiber, which degraded at a lower temperature than the HDPE did. Both the storage modulus and the loss modulus increased with the proportion of fiber. Based on differential scanning calorimetry, neither the fiber proportion nor the coupling agent proportion affected the material melting temperature. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Type de document: Article
Mots-clés libres: Birch fiber Composite Compounding Dynamic mechanical analysis Mechanical properties Thermogravimetric analysis Aliphatic compounds Calorimeters Contact angle Coupling agents Decomposition Density (specific gravity) Differential scanning calorimetry Elastic moduli Graphite fibers Hardwoods High density polyethylenes Scanning electron microscopy Wetting Wood products Fiber composite Flexural modulus Lower temperatures Quebec, Canada Synthetic carbon Tensile elastic modulus Thermogravimetry analysis Wood plastic composite Fibers
Date de dépôt: 03 mars 2022 19:53
Dernière modification: 03 mars 2022 19:53
Version du document déposé: Version officielle de l'éditeur
URI: https://depot-e.uqtr.ca/id/eprint/9997

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