Naslov
Chemical recycling of postconsumer PET bottles

Autori
Ptiček Siročić, Anita ; Hrnjak-Murgić, Zlata ; Jelenčić, Jasenka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
3 rd International Symposium on Environmental Management Towards Sustainable Technologies, Book of Abstracts / Koprivanac, Natalija ; Kušić, Hrvoje ; Lončarić Božić, Ana - Zagreb : Fakultet kemijskog inženjerstva i tehnologije Sveučilišta u Zagrebu, 2011, 110-110

ISBN
978-953-6470-55-6

Skup
3 rd International Symposium on Environmental Management Towards Sustainable Technologies

Mjesto i datum
Zagreb, Hrvatska, 26.10.2011. - 28.10.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
chemical recycling; glycolysis; poly(ethylene-terephthalate)

Sažetak
Nowadays the poly (ethylene-terephtalate), PET is one of the most commonly used synthetic polymers due to the growing application as an engineering plastic. The disposal of a large number of PET products, especially PET bottles has caused serious environmental problems and researchers have begun to focus on recycling and management of plastic wastes. Chemical decomposition of PET and conversion into reusable chemical products is one of the important recycling strategies for this material. In this work 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. Bis(2-hydroxyethyl)terephthalate (BHET), dimer and various types of PET oligomers are predominately glycolysis products. The glycolysis products were analysed and identified by Fourier infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). It was found that depending on the reaction conditions the glycolysis products consist mainly of monomer BHET, which was effectively separated from the other products. High concentration of obtained monomer and dimer BHET confirmed that almost complete depolymerization of PET polymer to monomers is achieved at 190 °C after 6 h of glycolysis. Also, from the results it can be seen that remained PET products i.e. oligomers are thermally very stable and they are suitable to obtain other polymers.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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