Biobased Transesterification Vitrimers

Macromolecular Rapid Communications, Год журнала: 2023, Номер 44(7)

Опубликована: Янв. 20, 2023

Abstract The rapid increase in the use of plastics and related sustainability issues, including depletion global petroleum reserves, have rightly sparked interest biobased polymer feedstocks. Thermosets cannot be remolded, processed, or recycled, hence reused because their permanent molecular architecture. Vitrimers emerged as a novel family capable bridging difference between thermoplastic thermosets. enable unique recycling strategies, however, it is still important to understand where raw material feedstocks originate from. Transesterification vitrimers derived from renewable resources are massive opportunity, limited research has been conducted this specific vitrimers. This review article provides comprehensive overview transesterification produced monomers. focus on biomass structural suitability with dynamic covalent chemistry, well viability synthetic methods.

Язык: Английский

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Vanillin-Based Epoxy Vitrimers: Looking at the Cystamine Hardener from a Different Perspective

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(15), С. 6021 - 6031

Опубликована: Апрель 3, 2023

Epoxy vitrimers encompass many advantages compared to traditional epoxy materials such as recyclability, repairability, and reprocessability. These properties are induced by the incorporation of dynamic reversible covalent bonds. Recently, aromatic disulfide bridges that has expanded development new eco-friendly materials. Herein, we studied a bio-based aliphatic based on cystamine hardener with vanillin-derived bio-sourced prepare fully vitrimers. This article provides comparative study between an benchmark issued from petrol resources. work demonstrated presence this significant influence not only reactivity, but most importantly resulting properties. An interesting yet counterintuitive accelerating effect exchanges was clearly 2 20% molar fraction added formulation. A similar glass transition obtained purely analogue, relaxation times were decreased order magnitude.

Язык: Английский

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On the Welding of Vitrimers: Chemistry, Mechanics and Applications

Advanced Functional Materials, Год журнала: 2023, Номер 33(36)

Опубликована: Май 18, 2023

Abstract Linear chains in thermoplastics make them relatively weak performance but inherently weldable and recyclable. By contrast, thermosets with permanently crosslinked networks possess outstanding mechanical performance, thermal, chemical stability, are unweldable unrecyclable. In the last decade, a kind of thermoplastics‐like termed as vitrimer has been developed extensive applications, which welding vitrimers plays central fundamental role. Herein, we present current state art discuss from broad picture chemistry, physics, mechanics: i) chemistry mechanics vitrimers; ii) applicability assessment methods for iii) design principles implement strategies to iv) effects conditions on strength toughness; v) applications adhesion chemically inert materials. Finally, advantages, challenges, open questions highlighted, future opportunities mechanics, tough welding, artificial intelligence aided programming technology, standard, so discussed. The development would fuse disciplines transformative impact polymer industry.

Язык: Английский

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Multiple H‐Bonding Cross‐Linked Supramolecular Solid–Solid Phase Change Materials for Thermal Energy Storage and Management

Advanced Materials, Год журнала: 2023, Номер 36(11)

Опубликована: Дек. 13, 2023

Solid-solid phase change materials (SSPCMs) are considered among the most promising candidates for thermal energy storage and management. However, application of SSPCMs is consistently hindered by canonical trade-off between high TES capacity mechanical robustness. In addition, they suffer from poor recyclability due to chemical cross-linking. Herein, a straightforward but effective strategy fabricating supramolecular with latent heat strength proposed. The polymer employs multiple H-bonding interactions as robust physical cross-links. This enables SSPCM enthalpy transition (142.5 J g

Язык: Английский

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Sustainable polymer composite marine structures: Developments and challenges

Progress in Materials Science, Год журнала: 2024, Номер 145, С. 101307 - 101307

Опубликована: Апрель 21, 2024

Язык: Английский

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Recyclable fire-retardant bio-based thermosets: From molecular engineering to performances and applications

Progress in Polymer Science, Год журнала: 2025, Номер unknown, С. 101935 - 101935

Опубликована: Март 1, 2025

Язык: Английский

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Polyolefins Vitrimers: Design Principles and Applications

Chemistry of Materials, Год журнала: 2022, Номер 34(23), С. 10249 - 10271

Опубликована: Ноя. 21, 2022

Less than 10% of plastics are recycled worldwide, among which polyolefins, form two-thirds all produced polymers, the most discarded ones. This stems from nonpolar nature limits their degradation and recycling. As such, any approach that may promote recycling polyolefins can significantly shift statistics polymer toward a more sustainable future. To account for that, vitrimer concept proposes unique solution not only increases polarity as such promotes degradation, but also expands utility polyolefin elastomers compensates significant loss mechanical properties upon sequential in thermoplastic polyolefins. Vitrimers networks formed by reversible covalent cross-links undergo percolation-conserving exchange reactions at high temperatures. Therefore, while they solid network service conditions, be reprocessed above temperature threshold. Thanks to this, have applications interface thermoplastics thermosets ranging recyclable, self-healing, adhesive materials creep-resistant shape-memory networks. Review aims classify cross-linking chemistries employed production polyolefin-derived vitrimers highlight subsequent changes material further development novel vitrimers.

Язык: Английский

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Thermally Latent Bases in Dynamic Covalent Polymer Networks and their Emerging Applications

Advanced Materials, Год журнала: 2023, Номер 35(24)

Опубликована: Март 14, 2023

A novel strategy allowing temporal control of dynamic bond exchange in covalently crosslinked polymer networks via latent transesterification catalysts is introduced. Obtained by a straightforward air- and water-tolerant synthesis, the catalyst designed for an irreversible temperature-mediated release strong organic base. Its long-term inactivity at temperatures below 50 °C provides unique opportunity to equip covalent with creep resistance high bond-exchange rates, once activated. The presented thermally base conveniently introducible readily available building blocks and, as proof concept, applied radically polymerized thiol-ene network. Light-mediated curing used 3D-printing functional objects, on which possibility spatially controlled reshaping welding based illustrated. Since activated, limitations regarding sample geometry optical transparency do not apply, facilitates transfer well-established industrial technologies. Consequently, fiber-reinforced highly filled magneto-active composites are fabricated thermal approach. on-demand activation demonstrated (magneto-assisted) experiments, highlighting wide range potential future applications offered concept.

Язык: Английский

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Polymers as Aerospace Structural Components: How to Reach Sustainability?

Macromolecular Chemistry and Physics, Год журнала: 2023, Номер 224(24)

Опубликована: Сен. 25, 2023

Abstract The aerospace industry has been benefiting from the utilization of polymer materials since fiber‐reinforced composites (FRPC) offer high performances at low densities compared to metals. FRPC facilitated design lightweight materials, which is extensively used in aviation today. Since their first integration into structural parts, experienced exponential growth over years and received a special interest manufacturing engineering. While today major focus engineering, matrix relies on chemistry. However, aircraft are facing pressing issue related sustainability, environmental footprint an alarming level. In this review, commercial thermosetting employed structures exhibited chemistry perspective by depicting starting products curing reactions. potential help next‐generation sustainable for parts means feedstock, energy‐efficient processing, recycling, disseminated.

Язык: Английский

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Starch-Reinforced Vinylogous Urethane Vitrimer Composites: An Approach to Biobased, Reprocessable, and Biodegradable Materials

ACS Sustainable Chemistry & Engineering, Год журнала: 2023, Номер 11(22), С. 8350 - 8361

Опубликована: Май 25, 2023

Vitrimers represent permanent and dynamic polymer networks at the same time. The combination of covalent bonds widely available, biodegradable, biobased raw materials enables new polymers with an excellent carbon footprint, mechanical properties, outstanding features in terms multiple recycling methods, e.g., thermomechanical, chemical, biological reprocessing/reusability. Natural corn starch granules have been surface-modified by acetoacetylation reaction without using any additional solvent maintaining inner semicrystalline structure, giving a polyfunctional cross-linker for starch-reinforced vitrimer composites. Vinylogous urethane matrices were synthesized condensation fully acetoacetylated glycerol different diamines, while diamines deliberately selected as potentially materials. Seven matrix vitrimers content 0–70 wt % modified investigated their thermal properties. In total, 20 elastomeric thermosetting prepared, exhibiting high elastic moduli 2 GPa short stress relaxation times up to 70 %. composites show low swelling ratios, suppressing natural gelatinization water. Moreover, suitable enzymatic methods closed-loop cycles, remolding, reusability, biodegradability developed.

Язык: Английский

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