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Updated: Jun 27, 2025

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy
Published on: June 6, 2025
In situ dissolved polypropylene prediction by Raman and ATR-IR spectroscopy for its recycling
Sofiane Ferchichi1,2,3, Nida Sheibat-Othman2, Olivier Boyron3
1IFP Energies Nouvelles, Rond-Point de l'échangeur de Solaize, 69360 Solaize, France. maud.rey-bayle@ifpen.fr.
Abstract:
Monitoring the dissolution of polyolefins using online spectroscopy analysis is addressed in this work, with the aim of optimizing plastic recycling processes. Two in situ spectroscopic methods are used to predict the dissolved polymer content: Raman spectroscopy and attenuated total reflectance infrared spectroscopy. Commercially available polypropylenes are considered. Different solvents are selected based on their affinity with polypropylene. Partial least squares regression is employed to identify models predicting the polymer concentration for each solvent from the online spectra. Raman spectroscopy was found to give a better prediction. It was therefore used to study different parameters influencing the dissolution process, such as solvent type, temperature and polymer form.
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