1
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Baur M, Habé R, Mecking S. Aqueous Keto-Polyethylene Dispersions from Catalytic Copolymerization of Ethylene and Carbon Monoxide in Water. ACS Macro Lett 2024; 13:841-846. [PMID: 38913329 PMCID: PMC11256749 DOI: 10.1021/acsmacrolett.4c00313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 06/25/2024]
Abstract
Water-soluble [P,O]Ni(II) catalysts enable the direct catalytic nonalternating copolymerization of fundamental comonomers ethylene and carbon monoxide (CO) in water as an environmentally friendly reaction medium. This yields stable aqueous dispersions of high molecular weight polyethylene containing ∼1 mol % of largely isolated in-chain keto groups in the form of particles with sizes between 100 nm and 1 μm. The intermediate species of chain growth resulting from incorporation of polar comonomers are amenable to specific chain termination pathways in conjunction with water.
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Affiliation(s)
- Maximilian Baur
- Chair of Chemical Materials
Science, Department of Chemistry, University
of Konstanz, 78464 Konstanz, Germany
| | - Rosa Habé
- Chair of Chemical Materials
Science, Department of Chemistry, University
of Konstanz, 78464 Konstanz, Germany
| | - Stefan Mecking
- Chair of Chemical Materials
Science, Department of Chemistry, University
of Konstanz, 78464 Konstanz, Germany
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2
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Zhang W, Killian L, Thevenon A. Electrochemical recycling of polymeric materials. Chem Sci 2024; 15:8606-8624. [PMID: 38873080 PMCID: PMC11168094 DOI: 10.1039/d4sc01754d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 05/17/2024] [Indexed: 06/15/2024] Open
Abstract
Polymeric materials play a pivotal role in our modern world, offering a diverse range of applications. However, they have been designed with end-properties in mind over recyclability, leading to a crisis in their waste management. The recent emergence of electrochemical recycling methodologies for polymeric materials provides new perspectives on closing their life cycle, and to a larger extent, the plastic loop by transforming plastic waste into monomers, building blocks, or new polymers. In this context, we summarize electrochemical strategies developed for the recovery of building blocks, the functionalization of polymer chains as well as paired electrolysis and discuss how they can make an impact on plastic recycling, especially compared to traditional thermochemical approaches. Additionally, we explore potential directions that could revolutionize research in electrochemical plastic recycling, addressing associated challenges.
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Affiliation(s)
- Weizhe Zhang
- Organic Chemistry and Catalysis, Institute for Sustainable and Circular Chemistry, Faculty of Science, Utrecht University Universiteitsweg 99 Utrecht The Netherlands
| | - Lars Killian
- Organic Chemistry and Catalysis, Institute for Sustainable and Circular Chemistry, Faculty of Science, Utrecht University Universiteitsweg 99 Utrecht The Netherlands
| | - Arnaud Thevenon
- Organic Chemistry and Catalysis, Institute for Sustainable and Circular Chemistry, Faculty of Science, Utrecht University Universiteitsweg 99 Utrecht The Netherlands
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3
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Yuan H, Takahashi K, Hayashi S, Suzuki M, Fujikake N, Kasuya KI, Zhou J, Nakagawa S, Yoshie N, Li C, Yamaguchi K, Nozaki K. Synthesis of Novel Polymers with Biodegradability by Main-Chain Editing of Chiral Polyketones. J Am Chem Soc 2024; 146:13658-13665. [PMID: 38710172 DOI: 10.1021/jacs.4c04389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Although the use of biodegradable plastics is suitable for unrecoverable, single-use plastic, their high production cost and much lower variety compared to commodity plastics limit their application. In this study, we developed a new polymer with potential biodegradability, poly(ketone/ester), synthesized from propylene and carbon monoxide. Propylene and carbon monoxide are easily available at low costs from fossil resources, and they can also be derived from biomass. Using an atom insertion reaction to the main chain of the polymer, the main-chain editing of the polymer molecule proceeded with up to 89% selectivity for atom insertion over main-chain cleavage.
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Affiliation(s)
- Haobo Yuan
- Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Kohei Takahashi
- Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Shinya Hayashi
- Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Miwa Suzuki
- Gunma University Center for Food Science and Wellness, Maebashi, Gunma 371-8510, Japan
| | - Nobuhiro Fujikake
- Gunma University Center for Food Science and Wellness, Maebashi, Gunma 371-8510, Japan
| | - Ken-Ichi Kasuya
- Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
- Gunma University Center for Food Science and Wellness, Maebashi, Gunma 371-8510, Japan
| | - Jian Zhou
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
| | - Shintaro Nakagawa
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
| | - Naoko Yoshie
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
| | - Chifeng Li
- Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Kazuya Yamaguchi
- Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Kyoko Nozaki
- Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
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4
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Schwab S, Baur M, Nelson TF, Mecking S. Synthesis and Deconstruction of Polyethylene-type Materials. Chem Rev 2024; 124:2327-2351. [PMID: 38408312 PMCID: PMC10941192 DOI: 10.1021/acs.chemrev.3c00587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 01/16/2024] [Accepted: 02/07/2024] [Indexed: 02/28/2024]
Abstract
Polyethylene deconstruction to reusable smaller molecules is hindered by the chemical inertness of its hydrocarbon chains. Pyrolysis and related approaches commonly require high temperatures, are energy-intensive, and yield mixtures of multiple classes of compounds. Selective cleavage reactions under mild conditions (
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Affiliation(s)
- Simon
T. Schwab
- Chair of Chemical Materials Science,
Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Maximilian Baur
- Chair of Chemical Materials Science,
Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Taylor F. Nelson
- Chair of Chemical Materials Science,
Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Stefan Mecking
- Chair of Chemical Materials Science,
Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
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5
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De Stefano F, Baur M, De Rosa C, Mecking S. Keto-Polyethylenes with Controlled Crystallinity and Materials Properties from Catalytic Ethylene-CO-Norbornene Terpolymerization. Macromolecules 2024; 57:1072-1079. [PMID: 38370911 PMCID: PMC10867887 DOI: 10.1021/acs.macromol.3c02309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/21/2023] [Accepted: 12/26/2023] [Indexed: 02/20/2024]
Abstract
Recent advances in Ni(II) catalyzed, nonalternating catalytic copolymerization of ethylene with carbon monoxide (CO) enable the synthesis of in-chain keto-functionalized polyethylenes (keto-PEs) with high-density polyethylene-like materials properties. Addition of norbornene as a bulky, noncrystallizable comonomer during catalytic polymerization allows tuning of the crystallinity in these keto-PE materials by randomly incorporated norbornene units in the polymer chain, while molecular weights are not adversely affected. Such crystallinity-reduced keto-PEs are characterized as softer materials with better ductility and may therefore be more suited for, e.g., potential film applications.
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Affiliation(s)
- Fabio De Stefano
- Chair
of Chemical Materials Science, Department of Chemistry, University of Konstanz, Konstanz 78464, Germany
- Dipartimento
di Scienze Chimiche, Università di
Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, Napoli I-80126, Italy
| | - Maximilian Baur
- Chair
of Chemical Materials Science, Department of Chemistry, University of Konstanz, Konstanz 78464, Germany
| | - Claudio De Rosa
- Dipartimento
di Scienze Chimiche, Università di
Napoli Federico II, Complesso Monte S. Angelo, Via Cintia, Napoli I-80126, Italy
| | - Stefan Mecking
- Chair
of Chemical Materials Science, Department of Chemistry, University of Konstanz, Konstanz 78464, Germany
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6
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Johnson AM, Johnson JA. Thermally Robust yet Deconstructable and Chemically Recyclable High-Density Polyethylene (HDPE)-Like Materials Based on Si-O Bonds. Angew Chem Int Ed Engl 2023:e202315085. [PMID: 37903133 DOI: 10.1002/anie.202315085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 10/28/2023] [Accepted: 10/30/2023] [Indexed: 11/01/2023]
Abstract
Polyethylene (PE) is the most widely produced synthetic polymer. By installing chemically cleavable bonds into the backbone of PE, it is possible to produce chemically deconstructable PE derivatives; to date, however, such designs have primarily relied on carbonyl- and olefin-related functional groups. Bifunctional silyl ethers (BSEs; SiR2 (OR'2 )) could expand the functional scope of PE mimics as they possess strong Si-O bonds and facile chemical tunability. Here, we report BSE-containing high-density polyethylene (HDPE)-like materials synthesized through a one-pot catalytic ring-opening metathesis polymerization (ROMP) and hydrogenation sequence. The crystallinity of these materials can be adjusted by varying the BSE concentration or the steric bulk of the Si-substituents, providing handles to control thermomechanical properties. Two methods for chemical recycling of HDPE mimics are introduced, including a circular approach that leverages acid-catalyzed Si-O bond exchange with 1-propanol. Additionally, despite the fact that the starting HDPE mimics were synthesized by chain-growth polymerization (ROMP), we show that it is possible to recover the molar mass and dispersity of recycled HDPE products using step-growth Si-O bond formation or exchange, generating high molecular weight recycled HDPE products with mechanical properties similar to commercial HDPE.
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Affiliation(s)
- Alayna M Johnson
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Jeremiah A Johnson
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
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