Designed to Degrade: Tailoring Polyesters for Circularity

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(13), P. 8473 - 8515

Published: June 27, 2024

A powerful toolbox is needed to turn the linear plastic economy into circular. Development of materials designed for mechanical recycling, chemical and/or biodegradation in targeted end-of-life environment are all necessary puzzle pieces this process. Polyesters, with reversible ester bonds, already forerunners circularity: poly(ethylene terephthalate) (PET) most recycled material suitable and while common aliphatic polyesters biodegradable under favorable conditions, such as industrial compost. However, circular design needs be further tailored different options enable recycling greener conditions rapid enough even less environmental conditions. Here, we discuss molecular polyester chain targeting enhancement circularity by incorporation more easily hydrolyzable additional dynamic or degradation catalyzing functional groups part chain. The utilization replacement current volume plastics also reviewed well embedment green catalysts, enzymes matrices facilitate

Language: Английский

---

Fabrication, mechanical, finite element and In vitro evaluation of 3D printed polylactide/biphasic calcium phosphate composite blends

Materials Chemistry and Physics, Journal Year: 2024, Volume and Issue: 318, P. 129306 - 129306

Published: April 6, 2024

Language: Английский

---

Toward Circular Polymer Materials and Manufacturing: Dynamic Bonding Strategies for Upcycling Thermoplastics and Thermosets

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: May 7, 2025

Abstract The global production of plastics has reached unprecedented levels, with <10% being recycled and even fewer more than once. This lack circularity poses critical environmental threats. However, upcycling—recycling materials while improving their properties functionality—through dynamic bonding strategies offers a promising approach to enhancing polymer sustainability. Dynamic bonds enable polymeric structures reconfigure under specific conditions, thermal, chemical, mechanical resilience controllability facilitating recyclability. review specifically takes the viewpoint upcycling existing thermoplastics thermosets develop sustainable covalent networks (DCNs). Integrating these DCN into design additive manufacturing (AM) feedstocks creates unique benefits compared traditional systems. is briefly highlighted in extrusion‐based light‐based AM, assessing potential for improved material processability, recyclability, creation high‐value customized products. combination technologies AM techniques presents significant opportunity advance sustainability macromolecular science.

Language: Английский

---

Sustainable Vat Photopolymerization‐Based 3D‐Printing through Dynamic Covalent Network Photopolymers

Chemistry - An Asian Journal, Journal Year: 2024, Volume and Issue: 19(10)

Published: March 21, 2024

Abstract Vat photopolymerization (VPP) based three‐dimensional (3D) printing, including stereolithography (SLA) and digital light projection (DLP), is known for producing intricate, high‐precision prototypes with superior mechanical properties. However, the challenge lies in non‐recyclability of covalently crosslinked thermosets used these printing processes, limiting sustainable utilization printed prototypes. This review paper examines recently explored avenue VPP 3D‐printed dynamic covalent network (DCN) polymers, which enable reversible crosslinks allow reprocessing prototypes, promoting sustainability. These facilitate rearrangement providing polymers chemical/physical recyclability, self‐healing capabilities, degradability. While various mechanisms DCN polymer systems are explored, this focuses solely on photocurable to highlight their potential revolutionize sustainability 3D printing.

Language: Английский

---

Bio-based ester- and ester-imine resins for digital light processing 3D printing: The role of the chemical structure on reprocessability and susceptibility to biodegradation under simulated industrial composting conditions

European Polymer Journal, Journal Year: 2024, Volume and Issue: 219, P. 113384 - 113384

Published: Aug. 11, 2024

Four biobased ester and ester-imine photocurable resins were formulated evaluated for printability by digital light processing 3D printing. The resin formulations consisted of methacrylated eugenol alone or in combination with poly(hydroxybutyrate)-oligomers and/or vanillin-derived Schiff-base monomers. It was not possible to print into coherent thermosets, likely due the lower reactivity allyl-double bond. However, other building blocks improved printability, although some over-curing phenomena registered especially composed poly(hydroxybutyrate)-derived oligomers. three that successfully printed thermosets further their solvent resistance, thermal mechanical properties, reprocessability biodegradability under simulated industrial composting conditions. reprocessing experiments documented synergic effect imine dynamic covalent bonds favoring preservation elastic modulus thermosets; while an evidently higher deterioration properties ester-thermosets. biodegradation studies highlighted a clear correlation between rate chemical structure aliphatic components increasing thermosets' susceptibility

Language: Английский

---

Bio-based Epoxy Composites Demonstrating High Temperature Breakdown Strength and Thermal Conductivity for High Voltage Insulation

Chinese Journal of Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Language: Английский

---