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Topology-Accelerated and Selective Cascade Depolymerization of Architecturally Complex Polyesters

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.4c00526· OSTI ID:2337665

Despite considerable recent advances already made in developing chemically circular polymers (CPs), the current framework predominantly focuses on CPs with linear-chain structures of different monomer types. As polymer properties are determined by not only composition but also topology, manipulating the topology of the single-monomer-based CP systems from linear-chain structures to architecturally complex polymers could potentially modulate the resulting polymer properties without changing the chemical composition, thereby advancing the concept of monomaterial product design. To that end, here, we introduce a chemically circular hyperbranched polyester (HBPE), synthesized by a mixed chain-growth and step-growth polymerization of a rationally designed bicyclic lactone with a pendent hydroxyl group (BiLOH). This HBPE exhibits full chemical recyclability despite its architectural complexity, showing quantitative selectivity for regeneration of BiLOH, via a unique cascade depolymerization mechanism. Moreover, distinct differences in materials properties and performance arising from topological variations between HBPE, hb-PBiLOH, and its linear analogue, l-PBiLOH, have been revealed where generally the branched structure led to more favorable interchain interactions, and topology-amplified optical activity has also been observed for chiral (1S, 4S, 5S)-hb-PBiLOH. More intriguingly, depolymerization of l-PBiLOH proceeds through an unexpected, initial topological transformation to the HBPE polymer, followed by the faster cascade depolymerization pathway adopted by hb-PBiLOH. Overall, these results demonstrate that CP design can go beyond typical linear polymers, and rationally redesigned, architecturally complex polymers for their unique properties may synergistically impart advantages in topology-augmented depolymerization acceleration and selectivity for exclusive monomer regeneration.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing and Materials Technologies Office (AMMTO)
DOE Contract Number:
AC36-08GO28308
OSTI ID:
2337665
Report Number(s):
NREL/JA-2A00-89318; MainId:90097; UUID:6cf67a53-5f58-4966-9060-75d08dd356f4; MainAdminId:72252
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 13 Vol. 146
Country of Publication:
United States
Language:
English

References (63)

Recent progress on the synthesis of cyclic polymers via ring-expansion strategies journal May 2017
Closing the “One Monomer–Two Polymers–One Monomer” Loop via Orthogonal (De)polymerization of a Lactone/Olefin Hybrid journal January 2022
Design of Microstructure-Engineered Polymers for Energy and Environmental Conservation journal April 2023
Dendrimer as nanocarrier for drug delivery journal February 2014
Synthesis of structurally controlled hyperbranched polymers using a monomer having hierarchical reactivity journal November 2017
The Rheological and Mechanical Properties of PVC-Lignin Blends journal March 2012
Hyperbranched polymers: advances from synthesis to applications journal January 2015
Topological polymer chemistry journal July 2002
Breaking the Paradox between Grafting-Through and Depolymerization to Access Recyclable Graft Polymers journal October 2022
Polyvinyl chloride-based membranes: A review on fabrication techniques, applications and future perspectives journal December 2021
Balanced basis sets of split valence, triple zeta valence and quadruple zeta valence quality for H to Rn: Design and assessment of accuracy journal January 2005
100th Anniversary of Macromolecular Science Viewpoint: Toward Catalytic Chemical Recycling of Waste (and Future) Plastics journal October 2020
Dendrimers in drug research journal January 2004
Triazabicyclodecene:  A Simple Bifunctional Organocatalyst for Acyl Transfer and Ring-Opening Polymerization of Cyclic Esters journal March 2006
Learning Nature: Recyclable Monomers and Polymers journal June 2018
Hyperbranched and Highly Branched Polymer Architectures—Synthetic Strategies and Major Characterization Aspects journal November 2009
Architecturally Complex Polymers with Controlled Heterogeneity journal August 2011
Plastic waste inputs from land into the ocean journal February 2015
Mono-material product design with bio-based, circular, and biodegradable polymers journal June 2023
Chain Walking: A New Strategy to Control Polymer Topology journal March 1999
Plastic futures and their CO2 emissions journal December 2022
Controlled Synthesis of Hyperbranched Polyglycerols by Ring-Opening Multibranching Polymerization journal June 1999
Hybrid monomer design for unifying conflicting polymerizability, recyclability, and performance properties journal March 2021
Hybrid Monomer Design Synergizing Property Trade‐offs in Developing Polymers for Circularity and Performance journal May 2023
Future Directions for Sustainable Polymers journal May 2019
Well-defined graft copolymers: from controlled synthesis to multipurpose applications journal January 2011
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu journal April 2010
Adaptable Crosslinks in Polymeric Materials: Resolving the Intersection of Thermoplastics and Thermosets journal September 2019
Depolymerization of Bottlebrush Polypentenamers and Their Macromolecular Metamorphosis journal August 2019
Chemical recycling to monomer for an ideal, circular polymer economy journal April 2020
Chemical and biological catalysis for plastics recycling and upcycling journal July 2021
Chemically recyclable polymers: a circular economy approach to sustainability journal January 2017
Endowing Polythioester Vitrimer with Intrinsic Crystallinity and Chemical Recyclability journal March 2023
Cleavable comonomers enable degradable, recyclable thermoset plastics journal July 2020
The effect of hydrogen bonding on the glass transition temperatures of polymer mixtures journal June 1984
Functional hyperbranched polymers with advanced optical, electrical and magnetic properties journal January 2015
Chemical recycling of waste plastics for new materials production journal June 2017
The synthesis, properties and potential applications of cyclic polymers journal April 2020
Predicted growth in plastic waste exceeds efforts to mitigate plastic pollution journal September 2020
Closed-loop recycling of plastics enabled by dynamic covalent diketoenamine bonds journal April 2019
Polyolefin Innovations toward Circularity and Sustainable Alternatives journal July 2022
Multiblock Polymers: Panacea or Pandora's Box? journal April 2012
Toward Infinitely Recyclable Plastics Derived from Renewable Cyclic Esters journal February 2019
Critical advances and future opportunities in upcycling commodity polymers journal March 2022
Polyvinyl chloride modifications, properties, and applications: Review journal March 2022
Bioapplications of hyperbranched polymers journal January 2015
Site-Specifically Initiated Controlled/Living Branching Radical Polymerization: A Synthetic Route toward Hierarchically Branched Architectures journal December 2018
Molecular Parameters of Hyperbranched Polymers Made by Self-Condensing Vinyl Polymerization. 2. Degree of Branching journal November 1997
Emerging Trends in Closed‐Loop Recycling Polymers: Monomer Design and Catalytic Bulk Depolymerization journal February 2023
Hyperbranched polymers: a promising new class of materials journal October 2001
The Beauty of Branching in Polymer Science journal May 2020
Contribution to the study of rigid PVC polyblends with different lignins journal November 1997
The M06 suite of density functionals for main group thermochemistry, thermochemical kinetics, noncovalent interactions, excited states, and transition elements: two new functionals and systematic testing of four M06-class functionals and 12 other functionals journal July 2007
Recyclable, Strong Thermosets and Organogels via Paraformaldehyde Condensation with Diamines journal May 2014
Manufacturing energy and greenhouse gas emissions associated with plastics consumption journal January 2021
Hyperbranched polymers: from synthesis to applications journal March 2004
The Mechanism of TBD-Catalyzed Ring-Opening Polymerization of Cyclic Esters journal November 2007
Polymers with Complex Architecture by Living Anionic Polymerization journal December 2001
Design principles for intrinsically circular polymers with tunable properties journal November 2021
The Reaction Mechanism for the Organocatalytic Ring-Opening Polymerization of l -Lactide Using a Guanidine-Based Catalyst: Hydrogen-Bonded or Covalently Bound? journal May 2008
Production, use, and fate of all plastics ever made journal July 2017
Expanding the toolbox of controlled/living branching radical polymerization through simulation-informed reaction design journal May 2022
Hyperbranched polymer vesicles: from self-assembly, characterization, mechanisms, and properties to applications journal January 2015