Evolution of Copolymers of Epoxides and CO₂: Catalysts, Monomers, Architectures, and Applications

Chemical Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 25, 2024

The copolymerization of CO

Language: Английский

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The Historical Development of the Concepts Underlying the Design and Construction of Targeted Coordination Polymers/MOFs: A Personal Account

The Chemical Record, Journal Year: 2024, Volume and Issue: 24(5)

Published: May 1, 2024

Abstract Presented here is a personal account of how the ideas and concepts underlying design construction coordination polymers/MOFs developed historically ‐ from earliest conjectures in 1970’s about possibility using pre‐organized building blocks to construct targeted polymeric structures, initial experimental implementation these mid‐80’s introduction name MOFs 90’s. The early exploratory work with described this article paved way for subsequent explosion research activity CP/MOF area generation an essentially unlimited range designed polymer structures promising variety useful properties.

Language: Английский

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Recycling Plastic Waste by Solid Phase Mixing

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 12, 2025

The global plastics problem poses significant environmental, energy, and climate challenges. Various innovative strategies have been proposed for recycling plastics, either in open or closed loops, each addressing different aspects of the problems hindering achievement a circular economy. Amidst these efforts, reuse mixed plastic waste still remains particular challenge, arising from immiscibility, resulting materials with suboptimal properties. In this context, we report novel strategy based on high-pressure solid-phase mixing wastes, ensuring conversion binary immiscible polymer mixture into consisting entirely polymer–polymer interphase. represents advancement as it allows production mixtures enhanced mechanical properties, all while avoiding degradation initial molecular weight polymeric components. demonstrated effectiveness spans range pairs, including polyolefins, polystyrene, polyesters, which collectively constitute about 70% waste.

Language: Английский

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Immortal Depolymerization of Chemical Recycling of CO2-Sourced Poly (Cyclohexene Carbonate) to Monomers: An Overlooked Effect of Molecular Weight

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128204 - 128204

Published: Feb. 1, 2025

Language: Английский

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Chemical Recycling of Poly(cyclohexene carbonate)s via Synergistic Catalysis

ACS Macro Letters, Journal Year: 2024, Volume and Issue: 13(8), P. 1099 - 1104

Published: Aug. 12, 2024

Chemical recycling of polymers to the corresponding monomers offers a valuable solution address current plastics crisis for creating an ideal and circular polymer economy. Here, we present bimetallic synergistic depolymerization widely studied CO

Language: Английский

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Unraveling the Mechanism of Catalyzed Melt-Phase Polyester Depolymerization via Studies of Kinetics and Model Reactions

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(37), P. 25745 - 25754

Published: Sept. 3, 2024

Developing a mechanistic understanding of catalyzed melt-phase depolymerization processes is utmost importance to the rapidly expanding field circular polymers with closed chemical loop. Herein, we present methodology probe mechanism metal-catalyzed polyesters utilizing an approach centered on studies kinetics by thermogravimetric analysis and model reactions. Kinetic parameters associated prototypical Lewis-acid-catalyzed representative polyesters, including poly(δ-valerolactone) (PVL), poly(lactic acid), poly(γ-butyrolactone), are elucidated. Focusing PVL for further investigation mechanism, effects its molar mass, topology, end-group chemistry examined in detail. Overall, ring-closing process monomer from polyester hydroxyl-chain ends proposed as key step, although has relatively large zip length (≈ 320) follows nonimmortal kinetics.

Language: Английский

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CO₂-based polycarbonates from biobased cyclic terpenes with end-of-life usage potential

Polymer Chemistry, Journal Year: 2024, Volume and Issue: 15(36), P. 3657 - 3666

Published: Jan. 1, 2024

Biobased menthyl, thymyl, and carvacryl glycidyl ethers were copolymerized with CO 2 , leading to molar masses up 60 kg mol −1 T g values ranging from 0 58 °C. The polymers degrade under basic conditions, affording diols for recycling.

Language: Английский

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Sustainable polycarbonates production from CO2

Advances in bioenergy, Journal Year: 2024, Volume and Issue: unknown, P. 171 - 246

Published: Jan. 1, 2024

Language: Английский

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Efficient Polymerization and Selective Depolymerization of Poly(cyclopentene carbonate) Mediated Solely by Heterometallic Rare-Earth(III)/Zinc(II) Complexes

Macromolecules, Journal Year: 2024, Volume and Issue: 57(21), P. 10041 - 10052

Published: Oct. 30, 2024

Poly(cyclopentenyl carbonate) (PCPC) is a recyclable polymer with great potential applications. However, the selective preparation of PCPC from cyclopentene oxide (CPO) and CO2 copolymerization chemical recycling back to original monomer CPO are challenge. In this work, it was found that heterometallic rare-earth metal(III)/Zn(II) complexes (RE(III)-Zn(II) complexes) supported by phenylenediamine-bridged triphenols could serve as highly active catalysts for give pure PCPC. Remarkably, same alone also promote depolymerization only simply raising reaction temperature up ca. 160 °C. The mechanisms were proposed.

Language: Английский

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Depolymerization by transition metal complexes: strategic approaches to convert polymeric waste to feedstocks

Dalton Transactions, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 30, 2024

Conversion of plastic waste into feedstocks by transition metal catalysts: Strategies for converting polymeric through catalytic depolymerization complexes and organometallic compounds are highlighted.

Language: Английский

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