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Related Concept Videos

Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
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Updated: Jan 17, 2026

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
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Highly Efficient Photothermal-Catalytic Depolymerization of Polyester Fiber Enabled by a Phosphotungstate-Based

Xin Li1, Yiming Bu1,2, Lu Jiang1

  • 1Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Geelong, Victoria, 3216, Australia.

Small (Weinheim an Der Bergstrasse, Germany)
|September 15, 2025
PubMed
Summary

This study introduces a new photothermal catalyst for plastic recycling. It efficiently breaks down polyethylene terephthalate (PET) using ethylene glycol (EG) under mild conditions, offering a sustainable solution.

Keywords:
local heating effectphotothermal depolymerizationpolyester fibersingle‐atom catalyst

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Catalysis

Background:

  • Plastics like polyethylene terephthalate (PET) offer durability due to chemical inertness and thermal stability.
  • These properties, however, pose significant challenges for efficient and mild recycling processes.

Purpose of the Study:

  • To develop a novel photothermal catalytic system for the efficient and rapid depolymerization of PET.
  • To investigate the mechanism of PET decomposition using Density Functional Theory (DFT) calculations.

Main Methods:

  • Development of a photothermal catalytic system using Palladium (Pd) single-atom catalysts (SACs) anchored on activated carbon.
  • Utilizing side lighting to optimize photothermal conversion and prevent ethylene glycol (EG) evaporation.
  • Employing Density Functional Theory (DFT) to elucidate the catalytic mechanism.

Main Results:

  • Achieved near-complete PET decomposition within 4 hours under a light intensity of 0.5 W cm-2.
  • Demonstrated that the unique electronic structure of Pd facilitates the nucleophilic attack of EG on PET.
  • Lowered the reaction energy barrier for PET decomposition from 37.44 to 26.77 kcal mol-1 through Pd coordination.

Conclusions:

  • The developed Pd SACs on activated carbon system offers a cost-effective and sustainable method for PET recycling.
  • This research presents a promising strategy for designing efficient catalysts for plastic depolymerization.
  • The findings provide fundamental insights into the catalytic mechanism of PET recycling.