Direct Monomer Recovery from Ring-Closing Depolymerization of Thermosets DOI Creative Commons
Chihui Zheng, Gadi Slor, Youwei Ma

et al.

ACS Macro Letters, Journal Year: 2024, Volume and Issue: unknown, P. 1704 - 1710

Published: Dec. 7, 2024

Recovering monomers from the depolymerization of thermosets presents a significant challenge, which becomes even more daunting if one sets goal doing it directly, i.e., without complex chemical separation steps. To this end, we have synthesized new type polycarbonate thermoset by first copolymerizing alkyl cyclic carbonates (ACCs) with small amounts allyloxy (AoCCs), followed cross-linking resulting excess tetrathiol compounds under UV irradiation. These cross-linked polycarbonates demonstrate enhanced thermal and mechanical properties compared to their linear analogues, while maintaining polymers' capacity for ring-closing depolymerization. The process enables direct recovery ACC its dimer, bypassing steps that are commonly employed in recycling conventional chemically recyclable thermosets. yields range 74.7% 91.7% depending on ratios AoCC Furthermore, recovered can be repolymerized AoCCs leading same quality initially one.

Language: Английский

New sustainable polymers with on-demand depolymerization property DOI
Yangyang Sun, Zesheng An, Yanshan Gao

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(9), P. 2803 - 2841

Published: Aug. 12, 2024

Language: Английский

Citations

17
Advances and Challenges for Catalytic Recycling and Upgrading of Real-World Mixed Plastic Waste DOI
Yawen Shi, Xinyong Diao, Na Ji

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 15(2), P. 841 - 868

Published: Dec. 27, 2024

Catalytic conversion of waste plastic has attracted widespread attention due to pressing environmental issues and energy crisis. Although some methods have been successful in converting single-component waste, unfortunately, the real-world typically made up a mixture various plastics, which poses significant difficulties challenges for catalyst selection product distribution catalytic mixed plastic. Recently, number new technologies developed address plastic, aiming overcome limitations current drive progress this field. This review summarizes recycling upgrading into monomers or value-added chemicals by thermocatalysis, photocatalysis/photothermal catalysis, tandem chemical-biocatalysis. The construction efficient catalysts, understanding reaction pathways, design systems, practical applicability each method are highlighted discussed detail. Our goal is elucidate mechanisms principles process design, providing guidance development, integration optimization that enhance efficiency processing capabilities waste. Furthermore, economic feasibility impact treatment were comprehensively evaluated summarizing techno-economic analysis life cycle assessment studies. Lastly, remaining technological future directions industrial-scale generate products described.

Language: Английский

Citations

7
High Performance Polyurethanes with Extraordinary Hydrolytic Resistance Prepared from Bio-renewable Alkyl-δ-Lactones: Synthesis, Properties and Chemical Recycling DOI
Min Zhang, Yan Qin, Xinxin Yu

et al.

Polymer Degradation and Stability, Journal Year: 2025, Volume and Issue: unknown, P. 111322 - 111322

Published: March 1, 2025

Language: Английский

Citations

0
Chemical closed-loop recyclable thermosetting polymers based on dynamic covalent bonds DOI
Zihan Zhao, Jiajun Fu

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Language: Английский

Citations

0
Sustainable and Eco-Compatible Copolyesters with Applicable Properties: Controlled One-Pot Synthesis and Chemically Closed-Loop Recycling DOI
Zhenghe Yang, Xiaoping Ouyang, Si‐Chong Chen

et al.

Macromolecules, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Language: Английский

Citations

0
High-performance recyclable polymers enabled by stereo- and sequence-controlled polymerization DOI
Mengyuan Wang,

Yi-Min Tu,

Qinghua Zeng

et al.

Nature Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 16, 2025

Language: Английский

Citations

0
Direct Monomer Recovery from Ring-Closing Depolymerization of Thermosets DOI Creative Commons
Chihui Zheng, Gadi Slor, Youwei Ma

et al.

ACS Macro Letters, Journal Year: 2024, Volume and Issue: unknown, P. 1704 - 1710

Published: Dec. 7, 2024

Recovering monomers from the depolymerization of thermosets presents a significant challenge, which becomes even more daunting if one sets goal doing it directly, i.e., without complex chemical separation steps. To this end, we have synthesized new type polycarbonate thermoset by first copolymerizing alkyl cyclic carbonates (ACCs) with small amounts allyloxy (AoCCs), followed cross-linking resulting excess tetrathiol compounds under UV irradiation. These cross-linked polycarbonates demonstrate enhanced thermal and mechanical properties compared to their linear analogues, while maintaining polymers' capacity for ring-closing depolymerization. The process enables direct recovery ACC its dimer, bypassing steps that are commonly employed in recycling conventional chemically recyclable thermosets. yields range 74.7% 91.7% depending on ratios AoCC Furthermore, recovered can be repolymerized AoCCs leading same quality initially one.

Language: Английский

Citations

1