Co-authors​ :

 Nahed HERMASSI (FRANCE), Yves GROHENS , Noamen GUERMAZI  

The reuse of abandoned materials becomes an act of social responsibility, recognizing that our individual actions have collective repercussions. It aligns with a global vision where every gesture matters to preserve our planet for the well-being of future generations. This research explores the waste of fishing nets as a source of the recycled PA6. Using the compression molding technique, we ameliorate the manufacturing process by using a fixing system to eliminate the deviation of the tape on the matrix. This involves implementing a range of temperature (230°C, 240°C, 250°C) and pressure (15bars, 20 bars, 25 bars) variations to optimize the fabrication process. Recycled materials always differ from virgin materials during handling. Therefore this research finds a compromise in order to make a better comparison. This approach not only ensures efficient bonding between the tape and matrix but also allows for flexibility in adjusting the conditions to achieve the best results during implementation. The use of unidirectional (UD) glass fiber tapes at 60% weight (GF 60% wt) as a reinforcing material opens the way for incorporating continuous fibers with different weight ratios (4% , 8%, 12 %). Each sample undergoes two compression molding cycles , one for plate formation and the second for the impregnation of the tape into matrix. This study explores the adhesion dynamics between the matrix and glass fibers in composites including recycled Polyamide 6 (PA6) matrix reinforced with PA6/glass fiber tape. Tensile fracture surface analyses using scanning electron microscopy (SEM) were performed to explore microstructural features and assess the extent of fiber-matrix interaction. Results indicate that in the case of glass fiber-reinforced PA6, recycled matrix deformation is constrained, leading to a brittle fracture. Despite fiber pull-out during deformation, the matrix remains attached to the fibers, resulting in failure at the fiber-matrix interface. Micrographs of fracture surfaces in PA6 composites further highlight that failure predominantly occurs at the matrix, emphasizing the significance of the interphase. The polymer sheath on fiber surfaces indicates the strong interactions, with variations in physical properties near the fiber surface compared to the bulk polymer. This study contributes valuable insights into optimizing fiber-matrix adhesion in recycled PA6 composites for enhanced mechanical performance for automotive applications in order to align with the principles of circular economy.