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

и другие.

ACS Macro Letters, Год журнала: 2024, Номер unknown, С. 1704 - 1710

Опубликована: Дек. 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.

Язык: Английский

Closed-Loop Chemical Recycling of a Biobased Poly(oxanorbornene-fused γ-butyrolactone) DOI Creative Commons
Eva Harsevoort,

Răzvan C. Cioc,

Martin Lutz

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Дек. 2, 2024

New polymers, properly designed for end-of-life and efficiently formed from renewable carbon, are key to the transition a more sustainable circular plastics economy. Ring-opening polymerization (ROP) of bicyclic lactones is promising method production intrinsically recyclable polyesters, but most lactone monomers lack an efficient synthesis route biobased starting materials, even though this essential sustainably account material loss during life cycle. Herein, we present exceptionally rapid controlled fully tricyclic oxanorbornene-fused γ-butyrolactone monomer (

Язык: Английский

Процитировано

1
Direct Monomer Recovery from Ring-Closing Depolymerization of Thermosets DOI Creative Commons
Chihui Zheng, Gadi Slor, Youwei Ma

и другие.

ACS Macro Letters, Год журнала: 2024, Номер unknown, С. 1704 - 1710

Опубликована: Дек. 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.

Язык: Английский

Процитировано

1