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Title: Dual Recycling of Depolymerization Catalyst and Biodegradable Polyester that Markedly Outperforms Polyolefins

Journal Article · · Angewandte Chemie (International Edition)

Chemically recyclable, circular polymers continue to attract increasing attention, but rendering both catalysts for depolymerization and high-performance polymers recyclable is a more sustainable yet challenging goal. Here we introduce a dual catalyst/polymer recycling system in that recyclable inorganic phosphomolybdic acid catalyzes selective depolymerization of high-ceiling-temperature biodegradable poly(δ-valerolactone) in bulk phase, which, upon reaching suitable molecular weight, exhibits outstanding mechanical performance with a high tensile strength of ≈66.6 MPa, fracture strain of ≈904 %, and toughness of ≈308 MJ m–3, and thus markedly outperforms commodity polyolefins, recovering its monomer in pure state and quantitative yield at only 100 °C. In sharp contrast, the uncatalyzed depolymerization not only requires a high temperature of >310 °C but is also low yielding and non-selective. Importantly, the recovered monomer can be repolymerized as is to reproduce the same polymer, thereby closing the circular loop, and the recycled catalyst can be reused repeatedly for depolymerization runs without loss of its catalytic activity and efficiency.

Research Organization:
Colorado State Univ., Fort Collins, CO (United States); Alliance for Sustainable Energy, LLC (United States)
Sponsoring Organization:
USDOE Office of Science (SC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Materials & Manufacturing Technologies Office (AMMTO); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Bioenergy Technologies Office (BETO); USDOE
Grant/Contract Number:
SC0022290; AC36-08GO28308
OSTI ID:
1973892
Alternate ID(s):
OSTI ID: 1973893; OSTI ID: 2422134
Journal Information:
Angewandte Chemie (International Edition), Vol. 62, Issue 26; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (51)

Synthesis, Properties, and Applications of Bio-Based Cyclic Aliphatic Polyesters journal August 2021
Aliphatic Polyester Block Polymers: Renewable, Degradable, and Sustainable journal May 2014
Critical advances and future opportunities in upcycling commodity polymers journal March 2022
Future Directions for Sustainable Polymers journal May 2019
Lactide-Valerolactone Copolymers for Packaging Applications journal December 2021
Quantitative Theory for Linear Dynamics of Linear Entangled Polymers journal July 2002
Biodegradable Polyhydroxyalkanoates by Stereoselective Copolymerization of Racemic Diolides: Stereocontrol and Polyolefin‐Like Properties journal March 2020
Organocatalytic Ring-Opening Polymerization journal December 2007
Rapid and Controlled Polymerization of Bio‐sourced δ‐Caprolactone toward Fully Recyclable Polyesters and Thermoplastic Elastomers journal February 2022
Ring-opening polymerization of γ-lactones and copolymerization with other cyclic monomers journal November 2020
Modelling flow-enhanced crystallisation during fused filament fabrication of semi-crystalline polymer melts journal December 2018
Chemically recyclable polymers: a circular economy approach to sustainability journal January 2017
Versatile 2-Methoxyethylaminobis(phenolate)yttrium Catalysts: Catalytic Precision Polymerization of Polar Monomers via Rare Earth Metal-Mediated Group Transfer Polymerization journal November 2014
Thermodynamic Presynthetic Considerations for Ring-Opening Polymerization journal February 2016
Organic Catalysis for Ring-Opening Polymerization journal November 2012
Defining the Macromolecules of Tomorrow through Synergistic Sustainable Polymer Research journal February 2022
Learning Nature: Recyclable Monomers and Polymers journal June 2018
The Temperature Dependence of Relaxation Mechanisms in Amorphous Polymers and Other Glass-forming Liquids journal July 1955
Stereocontrolled ring-opening polymerization of cyclic esters: synthesis of new polyester microstructures journal January 2010
A roadmap towards green packaging: the current status and future outlook for polyesters in the packaging industry journal January 2017
Recent Advances in Metal‐Mediated Stereoselective Ring‐Opening Polymerization of Functional Cyclic Esters towards Well‐Defined Poly(hydroxy acid)s: From Stereoselectivity to Sequence‐Control journal December 2019
Chemical recycling to monomer for an ideal, circular polymer economy journal April 2020
Evaluation of different methods for the determination of the plateau modulus and the entanglement molecular weight journal June 2006
Controlled Ring-Opening Polymerization of Lactones and Lactides Initiated by Lanthanum Isopropoxide, 1. General Aspects and Kinetics journal April 2002
Rare-Earth Complexes Supported by Tripodal Tetradentate Bis(phenolate) Ligands: A Privileged Class of Catalysts for Ring-Opening Polymerization of Cyclic Esters journal August 2015
Redesigned Hybrid Nylons with Optical Clarity and Chemical Recyclability journal March 2022
Aliphatic Polyester Block Polymer Design journal March 2016
reptate rheology software: Toolkit for the analysis of theories and experiments journal May 2020
Completely recyclable biopolymers with linear and cyclic topologies via ring-opening polymerization of γ-butyrolactone journal November 2015
Highly Active, Productive, and Syndiospecific Yttrium Initiators for the Polymerization of Racemic β-Butyrolactone journal April 2006
Controlled Ring-Opening Polymerization of Lactide and Glycolide journal December 2004
Bio-based polyesters: Recent progress and future prospects journal September 2021
β-Diketiminate and β-Ketoiminate Metal Catalysts for Ring-Opening Polymerization of Cyclic Esters journal September 2022
A synthetic polymer system with repeatable chemical recyclability journal April 2018
Bio-based polymers with performance-advantaged properties journal September 2021
Achieving net-zero greenhouse gas emission plastics by a circular carbon economy journal October 2021
Living Coordination Polymerization of a Six-Five Bicyclic Lactone to Produce Completely Recyclable Polyester journal August 2018
Progress in Catalytic Ring-Opening Polymerization of Biobased Lactones book January 2022
Recent Developments in Lactone Monomers and Polymer Synthesis and Application journal May 2021
A circular polyester platform based on simple gem-disubstituted valerolactones journal November 2022
Ring-Opening Polymerization of Lactide with Group 3 Metal Complexes Supported by Dianionic Alkoxy-Amino-Bisphenolate Ligands: Combining High Activity, Productivity, and Selectivity journal January 2006
Synthetic biodegradable polyhydroxyalkanoates (PHAs): Recent advances and future challenges journal November 2022
Design principles for intrinsically circular polymers with tunable properties journal November 2021
Recent advances in the synthesis of aliphatic polyesters by ring-opening polymerization☆ journal June 2008
Recent Developments in Ring-Opening Polymerization of Lactones book January 2011
Multinuclear metal catalysts in ring-opening polymerization of ε‑caprolactone and lactide: Cooperative and electronic effects between metal centers journal January 2023
Toward Infinitely Recyclable Plastics Derived from Renewable Cyclic Esters journal February 2019
Poly(trimethylene carbonate-co-valerolactone) copolymers are materials with tailorable properties: from soft to thermoplastic elastomers journal January 2020
Stereosequenced crystalline polyhydroxyalkanoates from diastereomeric monomer mixtures journal November 2019
Controlling polymer stereochemistry in ring-opening polymerization: a decade of advances shaping the future of biodegradable polyesters journal January 2021
Ring-opening Copolymerization of ε-Caprolactone and δ-Valerolactone Catalyzed by a 2,6-Bis(amino)phenol Zinc Complex journal October 2019