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Recycling of poly(ethylene terephthalate) – a review focusing on chemical methods

  • Recycling of poly(ethylene terephthalate) (PET) is of crucial importance, since worldwide amounts of PETwaste increase rapidly due to its widespread applications. Hence, several methods have been developed, like energetic, material, thermo-mechanical and chemical recycling of PET. Most frequently, PET-waste is incinerated for energy recovery, used as additive in concrete composites or glycolysed to yield mixtures of monomers and undefined oligomers. While energetic and thermo-mechanical recycling entail downcycling of the material, chemical recycling requires considerable amounts of chemicals and demanding processing steps entailing toxic and ecological issues. This review provides a thorough survey of PET-recycling including energetic, material, thermo-mechanical and chemical methods. It focuses on chemical methods describing important reaction parameters and yields of obtained reaction products. While most methods yield monomers, only a few yield undefined low molecular weight oligomers for impaired applications (dispersants or plasticizers). Further, the present work presents an alternative chemical recycling method of PET in comparison to existing chemical methods.

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Author of HS ReutlingenGeyer, Björn; Lorenz, Günter; Kandelbauer, Andreas
Erschienen in:eXPRESS polymer letters
Publisher:University of Technology and Economics, Department of Polymer Engineering
Place of publication:Budapest
Document Type:Journal article
Publication year:2016
Tag:degradation; monomers; oligomers; poly(ethylene terephthalate); recycling
Page Number:28
First Page:559
Last Page:586
DDC classes:540 Chemie
Open access?:Ja
Licence (German):License Logo  Open Access