Chemical recycling of postconsumer poly bottles --depolymerization study

Poly(ethylene-terephthalate), PET bottles waste was chemically recycled by glycolysis process. The glycolysis reaction was carried out at three temperatures 170, 180 and 190°C in different time intervals (1, 3, 6 hours) with a weight ratio of ethylene glycol (EG) to PET 1:18 and the zinc acetate as...

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Veröffentlicht in:Chemical and biochemical engineering quarterly 2013, Vol.27 (1), p.65
Hauptverfasser: Sirocic, A. Pticek, Fijacko, A, Hrnjak-Murgic, Z
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creator Sirocic, A. Pticek
Fijacko, A
Hrnjak-Murgic, Z
description Poly(ethylene-terephthalate), PET bottles waste was chemically recycled by glycolysis process. The glycolysis reaction was carried out at three temperatures 170, 180 and 190°C in different time intervals (1, 3, 6 hours) with a weight ratio of ethylene glycol (EG) to PET 1:18 and the zinc acetate as a catalyst. The glycolysis reaction leads to formation of monomers bis(2-hydroxyethyl)terephthalate (BHET) and ethylene glycol as well as various types of PET oligomers. Depolymerization products were further characterized by infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). From the results it can be seen that remained PET products i.e. oligomers are thermally very stable and they are suitable for obtaining other polymers. Key words: Bis(2-hydroxyethyl)terephthalate, chemical recycling, glycolysis, oligomers, poly(ethylene-terephthalate)
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subjects Chemical research
Plastic bottles
Polyethylene terephthalate
Polymerization
Waste management
title Chemical recycling of postconsumer poly bottles --depolymerization study
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