Richard Soucy, Ruan-Isabelle, Smith, Adam W., Dupuis, Kevin, Tabiai, Ilyass et Dubé, Martine.
2025.
« Large scale fused-granular-fabrication using recycled carbon fibre/PEKK-PEEK pellets derived from aerospace prepreg waste ».
Composites Communications, vol. 60.
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Résumé
The manufacturing of thermoplastic unidirectional prepreg rolls involves trimming the edges as they do not meet specifications in terms of thickness and fibre content. This production waste, referred to as tape edge trim (TET), is recycled and transformed into pellets to be used as a feedstock for fused-granular-fabrication (FGF). In the transformation of the TET waste into pellets, neat PEEK polymer is added to the CF/PEKK TET to reduce the fibre content and improve the printability of the material. A large scale six-axis FGF printing robot is employed to print boxes from the recycled and virgin pellets. DSC analyses performed on recycled and virgin pellets reveal the degradation of PEEK and PEKK following aging at 380 °C or 400 °C under oxidative conditions, due to crosslinking reactions. However, no degradation is observed for specimens manufactured by FGF. As commonly observed for parts manufactured using extrusion-based techniques, the standard tensile and flexural specimens extracted from the FGF boxes demonstrate anisotropic mechanical properties. Additional boxes are manufactured by FGF using pellets obtained from shredded FGF box fragments to assess the capability of recycling the material a second time. A reduction of the stiffness and strength of the material is shown for this second recycling, which is assumed to be due to polymer chain scission and reduction in fibre length occurring during the shredding of the printed parts.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Tabiai, Ilyass Dubé, Martine |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 17 déc. 2025 15:23 |
| Dernière modification: | 10 janv. 2026 16:35 |
| URI: | https://espace2.etsmtl.ca/id/eprint/33141 |
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