From End Group to Tunable Comonomer: Sustainable Upcycling of Waste PET Into High-Value Added Copolyesters via a Controlled One-Pot Transesterification Process.

Yixiao Yu, Chao Zeng, Shengming Zhang, Peng Ji, Chaosheng Wang, Huaping Wang

Abstract read

In one paragraph

Article in ChemSusChem, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Yixiao YuState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, P. R. China.

Chao ZengState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, P. R. China.

Shengming ZhangState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, P. R. China.

Peng JiInnovation Center for Textile Science and Technology, Donghua University, Shanghai, P. R. China.ORCID https://orcid.org/0000-0001-5036-9381

Chaosheng WangState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, P. R. China.

Huaping WangKey Laboratory of High Performance Fibers & Products, Ministry of Education, Donghua University, Shanghai, P. R. China.

Funding

"Taodu Zhiguang" Technology Research and Development Plan with the "Unveiling and Leading" Mechanism J2026003

6 · The paper itself

Abstract

Physical and chemical recycling of polyethylene terephthalate (PET) often yields low-grade materials or is costly, limiting sustainable reuse. This study employed a one-pot transesterification reaction using value-added CHDM. The mechanism of the CHDM-mediated depolymerization-repolymerization was systematically investigated, proposing a two-step reaction mechanism based on hydroxyl-ester transesterification (HET) and ester-ester transesterification (EET). The role of CHDM from end groups to copolymer units was clarified, providing theoretical guidance for the upcycling of waste PET. This process achieves direct one-pot upcycling without intermediate separation. By adjusting the feed ratio of CHDM to PET, recycled PECT copolyester (r-PECT) can be obtained. The physical properties of this material are comparable to virgin PETG. Films processed from waste PET exhibit excellent optical transmittance and high cell viability, supporting their potential applications in packaging and biomedicine. Furthermore, the strategy demonstrates broad applicability, successfully applied to various polyester wastes. Technoeconomic analysis predicts a 30.8% material cost reduction versus virgin PETG. Life cycle assessment shows that the global warming potential of 1 kg of heat-shrinkable film produced through this route is 1.10 kg CO

Indexed as

CHDMester–ester transesterificationhydroxyl transesterificationone‐potPECT copolyesterupcyclingwaste PET

Identifiers

PMID42340117

DOI10.1002/cssc.70830

PMCPMC13369788

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.