Identification of recycled PET fibers using TMAH-assisted reactive pyrolysis-GC/MS and machine learning.
Recycled poly(ethylene terephthalate) (rPET) is increasingly used in polyester fibers, but reliable molecular-level identification remains challenging because chemical differences between virgin poly(ethylene terephthalate) (vPET) and rPET are often weak and distributed across multiple trace features. In this study, a...