Closed-loop circular economy in ‘upcycled’ acrylonitrile–butadiene–styrene vitrimer

European Polymer Journal, Journal Year: 2024, Volume and Issue: 220, P. 113451 - 113451

Published: Sept. 10, 2024

Language: Английский

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Extrudable and Highly Creep-Resistant Covalent Adaptable Networks Made from Polyethylene and Ethylene/1-Octene Copolymers by Reactive Processing with Aromatic Disulfide Cross-Links

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

Polyolefins like polyethylene (PE) and ethylene-based copolymers are widely used in consumer industrial applications due to their versatility, the diversity tunability of properties, theoretical recyclability at elevated temperatures. However, recycling rates markedly low, and, though cross-linking PE enhances its properties through creation a networked architecture, resulting thermoset known as PEX is rendered completely unrecyclable. Incorporating associative or dissociative dynamic covalent bonds cross-links into plastics promising route both make use spent (via "upcycling" them) generate recyclable alternatives unrecyclable thermosets PEX. Such materials adaptable networks CANs (also called vitrimers if exclusively associative). Here, we present method for imbuing polymers with aromatic disulfide cross-links, robust, reprocessable CANs. Radical-based reactive processing ethylene/1-octene-based 1 wt % dicumyl peroxide 5 bis(4-methacryloyloxyphenyl) (BiPheS methacrylate BPMA) successfully resulted which fully recovered cross-link densities associated thermomechanical after multiple reprocessing cycles. These demonstrate remarkable elevated-temperature creep resistance high-temperature thermal stability high temperatures required exchanges BiPheS-based cross-links. copolymer also enable (re)processability via extrusion temperatures, property recovery demonstrated 260 °C, thereby indicating feasibility extending our approach scales processes well other rigorous applications.

Language: Английский

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Fully Recyclable Pluripotent Networks for 3D Printing Enabled by Dissociative Dynamic Bonds

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 2, 2025

Abstract Additive manufacturing (AM) has risen in popularity due to its ability produce complex shapes a material‐efficient way. However, objects with advanced properties, multimaterial strategies are often employed. This one‐polymer‐one‐property paradigm significantly slows down the application of AM, and particular fused deposition modeling (FDM), for functional objects. In this study advantage pluripotency materials is taken, i.e., attain different properties from single stock, afford mechanically tunable 3D printed dynamic thermosets (moduli 2 MPa – 3 GPa, 1500× increase, Stress at break 70 MPa, 35× increase). To do so, FDM‐compatible CO ‐derived dissociative polymer networks designed that undergo reaction‐induced phase‐separation (DRIPS). strategy enables control size rigid phase simple post‐printing thermal treatment, cascading spatially patterned mechanical properties. showcases new directions printing communities, deep implications soft robotics compliant mechanics.

Language: Английский

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Dynamic Cross-Linker Facilitates a Closed-Loop Circular Economy in Upcycled Acrylonitrile-Butadiene-Styrene

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 4, 2025

Language: Английский

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Recycling reinvented: Converting PET bottle waste into 3D printable PCR polypropylene vitrimers for a sustainable future

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162432 - 162432

Published: April 1, 2025

Language: Английский

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Source of Processable Vitrimer Viscosities: Swap Frequencies and Steric Factors

Macromolecules, Journal Year: 2024, Volume and Issue: 57(23), P. 11020 - 11029

Published: Nov. 29, 2024

Language: Английский

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