Closed‐Loop Recycling of Poly(Imine‐Carbonate) Derived from Plastic Waste and Bio‐based Resources

Saito, Keita; Eisenreich, Fabian; Türel, Tankut; Tomović, Željko

doi:10.1002/ange.202211806

Cited by 9 publications

(4 citation statements)

References 59 publications

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“…Polycarbonate synthesis from cyclic epoxides and CO 2 is attractive for producing both linear and cyclic polymer architectures . Informative reviews provide a deeper look at the catalyst systems employed. , While not comprehensive, it is useful to highlight some specific avenues for bioderived polycarbonates, including vanillin-derived imine carbonates and limonene/limonene-oxide-derived polycarbonates . Siragusa et al synthesized polycarbonates from biomass-derived diols and bicyclic carbonates .…”

Section: Polycarbonatesmentioning

confidence: 99%

Depolymerization within a Circular Plastics System

Clark,

Shaver

2024

Chem. Rev.

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The societal importance of plastics contrasts with the carelessness with which they are disposed. Their superlative properties lead to economic and environmental efficiency, but the linearity of plastics puts the climate, human health, and global ecosystems at risk. Recycling is fundamental to transitioning this linear model into a more sustainable, circular economy. Among recycling technologies, chemical depolymerization offers a route to virgin quality recycled plastics, especially when valorizing complex waste streams poorly served by mechanical methods. However, chemical depolymerization exists in a complex and interlinked system of end-of-life fates, with the complementarity of each approach key to environmental, economic, and societal sustainability. This review explores the recent progress made into the depolymerization of five commercial polymers: poly(ethylene terephthalate), polycarbonates, polyamides, aliphatic polyesters, and polyurethanes. Attention is paid not only to the catalytic technologies used to enhance depolymerization efficiencies but also to the interrelationship with other recycling technologies and to the systemic constraints imposed by a global economy. Novel polymers, designed for chemical depolymerization, are also concisely reviewed in terms of their underlying chemistry and potential for integration with current plastic systems.

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Section: Polycarbonatesmentioning

confidence: 99%

Depolymerization within a Circular Plastics System

Clark,

Shaver

2024

Chem. Rev.

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“…Several papers introduced the dynamic covalent bonds into PC and obtained notable transparency, thermal properties and chemical resistances, cellulose toughing, and biobased circulation . Meanwhile, transcarbonation (TC) is a remarkable approach to induce reprocessing capability in PCs by reacting between carbonyl groups and hydroxyl groups. − , Bis (6-membered cyclic carbonate) (BCC) is a promising candidate as a source of carbonyl group, as it readily reacts with hydroxyl groups in high temperatures to achieve ring-opening cross-linking.…”

Section: Introductionmentioning

confidence: 99%

Effect of Composition on Viscoelastic Properties and Reprocessing Capability of Polycarbonate Vitrimer

Wang,

Kim,

Seo

2024

ACS Appl. Polym. Mater.

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Polycarbonate (PC) is not only one of the engineering plastics widely used in our daily lives due to its versatility but can also be reprocessed due to its thermoplastic properties. However, mechanical properties could not be maintained well after reprocessing. To address this issue, we designed the polycarbonate vitrimer (PCV), which offers the advantage of topological rearrangement through dynamic bond exchange, providing a facile approach to reprocess traditional PC. Our findings highlighted the optimization of the molar ratio between the hydroxyl and carbonyl groups, resulting in excellent reprocessing capability of PCV with the cross-linking density maintained at 96.8% after three reprocessing cycles. Moreover, the reprocessed PCV retained shape memory properties, underscoring its reprocessing performance, even after reprocessing cycles.

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“…This categorization underscores the ability of dynamic covalent bonds to provide significant mechanical properties alongside reversibility and stimulus responsiveness. Extensive research has explored a variety of dynamic covalent bonds, such as carbonate, [14] acetal, [15] disulfide, [16] ester, [17] imine bonds (Schiff‐base), [15a,18] Diels–Alder adduct, [19] diketoenamine, [20] aiming to develop polymer networks that are both recyclable and dynamically adaptable. These efforts highlight the potential of dynamic covalent bonds to revolutionize the design and functionality of polymer networks, offering a bridge between the enduring stability of covalent bonds and the flexible adaptability reversibility of non‐covalent interactions.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Environmentally Friendly Dual‐crosslinking Polymer Networks

Zhang,

Choi,

Kim

et al. 2024

Angewandte Chemie

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Environmentally friendly crosslinked polymer networks feature degradable covalent or non‐covalent bonds, with many of them manifesting dynamic characteristics. These attributes enable convenient degradation, facile reprocessibility, and self‐healing capabilities. However, the inherent instability of these crosslinking bonds often compromises the mechanical properties of polymer networks, limiting their practical applications. In this context, environmentally friendly dual‐crosslinking polymer networks (denoted EF‐DCPNs) have emerged as promising alternatives to address this challenge. These materials effectively balance the need for high mechanical properties with the ability to degrade, recycle, and/or self‐heal. Despite their promising potential, investigations into EF‐DCPNs remain in their nascent stages, and several gaps and limitations persist. This Review provides a comprehensive overview of the synthesis, properties, and applications of recent progress in EF‐DCPNs. Firstly, synthetic routes to a rich variety of EF‐DCPNs possessing two distinct types of dynamic bonds (i.e., imine, disulfide, ester, hydrogen bond, coordination bond, and other bonds) are introduced. Subsequently, complex structure‐ and dynamic nature‐dependent mechanical, thermal, and electrical properties of EF‐DCPNs are discussed, followed by their exemplary applications in electronics and biotechnology. Finally, future research directions in this rapidly evolving field are outlined.

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Closed‐Loop Recycling of Poly(Imine‐Carbonate) Derived from Plastic Waste and Bio‐based Resources

Cited by 9 publications

References 59 publications

Depolymerization within a Circular Plastics System

Depolymerization within a Circular Plastics System

Effect of Composition on Viscoelastic Properties and Reprocessing Capability of Polycarbonate Vitrimer

Recent Advances in Environmentally Friendly Dual‐crosslinking Polymer Networks

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