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Peer-reviewedCC BY 4.0Polymers

Single-Stage PET Waste Upcycling into Copolymers: Study of Thermal Properties and Crystallization

  • Kirill A. Kirshanov1
  • Gadir Sh. Aliev1
  • Daniil A. Ismaylov1
  • Nadezhda A. Lobanova1
  • Anton M. Pogorely1
  • Roman V. Toms1
  • Alexander Yu. Gervald1
  1. 1M.V. Lomonosov Institute of Fine Chemical Technologies, MIREA—Russian Technological University, Moscow 119571, Russia
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Abstract

The transesterification of polyester with hydroxyl-terminated oligoesters represents a promising route for the chemical upcycling of polyethylene terephthalate waste. The single-stage melt process under investigation yielded value-added PET-based copolyesters containing up to 15 mol.% diethylene glycol and triethylene glycol units. The effect of comonomer content on the thermal properties and crystallization of the copolymers was studied. It was found that an increase in the number of oxyethylene groups in the comonomer leads to a greater decrease in the glass transition temperature and the isothermal crystallization rate. Diethylene glycol was shown to lower the equilibrium melting temperature more than triethylene glycol. Thus, during PET upcycling, the glass transition temperature decreased from 80 to 50 °C, and the melting temperature from 280 to 250 °C.

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Cite

BibTeXRIS
BibTeX
@article{kirshanov2026singlestage,
  title = {{Single-Stage PET Waste Upcycling into Copolymers: Study of Thermal Properties and Crystallization}},
  author = {Kirill A. Kirshanov and Gadir Sh. Aliev and Daniil A. Ismaylov and Nadezhda A. Lobanova and Anton M. Pogorely and Roman V. Toms and Alexander Yu. Gervald},
  journal = {Polymers},
  year = {2026},
  month = oct,
  doi = {10.3390/polym18202587},
  url = {https://www.mdpi.com/2073-4360/18/20/2587},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Single-Stage PET Waste Upcycling into Copolymers: Study of Thermal Properties and Crystallization
AU  - Kirill A. Kirshanov
AU  - Gadir Sh. Aliev
AU  - Daniil A. Ismaylov
AU  - Nadezhda A. Lobanova
AU  - Anton M. Pogorely
AU  - Roman V. Toms
AU  - Alexander Yu. Gervald
PY  - 2026
DA  - 2026/10/20
JO  - Polymers
DO  - 10.3390/polym18202587
UR  - https://www.mdpi.com/2073-4360/18/20/2587
AB  - The transesterification of polyester with hydroxyl-terminated oligoesters represents a promising route for the chemical upcycling of polyethylene terephthalate waste. The single-stage melt process under investigation yielded value-added PET-based copolyesters containing up to 15 mol.% diethylene glycol and triethylene glycol units. The effect of comonomer content on the thermal properties and crystallization of the copolymers was studied. It was found that an increase in the number of oxyethylene groups in the comonomer leads to a greater decrease in the glass transition temperature and the isothermal crystallization rate. Diethylene glycol was shown to lower the equilibrium melting temperature more than triethylene glycol. Thus, during PET upcycling, the glass transition temperature decreased from 80 to 50 °C, and the melting temperature from 280 to 250 °C.
SN  - 2073-4360
ER  -