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ABSTRACT The degradation of polyethylene terephthalate (PET) bottles has been successfully achieved by depolymerization through glycolysis with pentaerythritol. The reaction was performed at 250°C in the presence of an organotin… Click to show full abstract
ABSTRACT The degradation of polyethylene terephthalate (PET) bottles has been successfully achieved by depolymerization through glycolysis with pentaerythritol. The reaction was performed at 250°C in the presence of an organotin catalyst. The glycolyzed products were characterized by 1D and 2D nuclear magnetic resonance (NMR) spectroscopy. The existence of the chemical bond between the polyol and the PET was detected through heteronuclear multiple bond correlation spectroscopy, and the NMR signals of different species were separated according to their diffusion coefficient by diffusion-ordered spectroscopy. This method offers a rapid quantification of glycolyzed products. Furthermore, it was found that the major product was the mono-pentaerythritol ester followed by the di-pentaerythritol ester, and lastly the tri-pentaerythritol ester.
Journal Title: International Journal of Polymer Analysis and Characterization
Year Published: 2017
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