Recyclability of Polypropylene in Fused Granulate Fabrication: Mechanical Performance through Multiple Printing Cycles

Key Points

• This research aims to investigate the recyclability and mechanical performance of polypropylene during multiple printing cycles in fused granulate fabrication.
• Evaluated mechanical performance of recycled polypropylene over six recycling cycles.
• Utilized SEM, Raman spectroscopy, and DSC to analyze microstructural changes.
• Examined failure mechanisms through fractography to correlate with molecular degradation.
• Mechanical performance decreased with each recycling cycle, indicating molecular degradation.
• Fractography revealed distinct failure mechanisms linked to microstructural evolution.
• FGF printing technique showed significant time savings compared to traditional FFF printing.