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Recycling of waste poly(ethylene terephthalate) with castor oil using microwave heating
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SYSNO ASEP 0397261 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Recycling of waste poly(ethylene terephthalate) with castor oil using microwave heating Author(s) Beneš, Hynek (UMCH-V) RID, ORCID
Slabá, J. (CZ)
Walterová, Zuzana (UMCH-V)
Rais, David (UMCH-V) RIDSource Title Polymer Degradation and Stability. - : Elsevier - ISSN 0141-3910
Roč. 98, č. 11 (2013), s. 2232-2243Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords poly(ethylene terephthalate) ; castor oil ; chemical recycling Subject RIV CD - Macromolecular Chemistry R&D Projects 2A-2TP1/135 GA MPO - Ministry of Industry and Trade (MPO) Institutional support UMCH-V - RVO:61389013 UT WOS 000327908800016 DOI 10.1016/j.polymdegradstab.2013.08.019 Annotation The chemical recycling of waste poly(ethylene terephthalate) (PET) using castor oil (CO) as a reagent is reported. CO presents a renewable alternative to petrochemical based reagents, e.g. glycols, and enables also substantial modification of final physico-chemical properties of a received product. Advantageously, microwave irradiation was used to accelerate the depolymerization of PET. A composition of obtained product was strongly influenced by the reaction temperature. When the decomposition of PET was performed at temperature higher than 240 °C, then a significant extent of side products based on PET oligomers and transesterified CO was observed due to dehydration and hydrolysis of CO. Contrary to that, PET decomposition took place at slow rate below 230 °C and the optimal reaction temperature lies in the relatively narrow interval from 230 °C to 240 °C. The product prepared in the optimal temperature range did not contain any high molecular weight PET oligomers. MALDI-TOF mass spectrometry enabled to identify the structures included in the obtained polyol product. The maximum number of six repeating monomeric unit of PET was found in the product, which confirmed practically the complete depolymerization of PET chain and good reactivity of the acylester hydroxyl groups of CO. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2014
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