Reactive and Functional Polymers, Год журнала: 2024, Номер 205, С. 106057 - 106057
Опубликована: Сен. 16, 2024
Язык: Английский
Chemical Reviews, Год журнала: 2024, Номер 124(12), С. 7829 - 7906
Опубликована: Июнь 3, 2024
Covalent network polymers, as materials composed of atoms interconnected by covalent bonds in a continuous network, are known for their thermal and chemical stability. Over the past two decades, these have undergone significant transformations, gaining properties such malleability, environmental responsiveness, recyclability, crystallinity, customizable porosity, enabled development integration dynamic chemistry (DCvC). In this review, we explore innovative realm polymers focusing on recent advances achieved through application DCvC. We start examining history fundamental principles DCvC, detailing its inception core concepts noting key role reversible bond formation. Then reprocessability DCvC is thoroughly discussed, starting from milestones that marked evolution progressing to current trends applications. The influence crystallinity then reviewed, covering diversity, synthesis techniques, functionalities. concluding section, address challenges faced field speculates potential future directions.
Язык: Английский
Процитировано
65
Nature Reviews Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Янв. 31, 2025
Язык: Английский
Процитировано
6
Science, Год журнала: 2025, Номер 388(6743), С. 170 - 175
Опубликована: Апрель 10, 2025
One approach for closed-loop plastics recycling relies on reverting polymers back into monomers because one can then make new without loss of properties. This depolymerization requirement restricts the molecular design to making with high mechanical performance. We report a three-dimensional (3D) printing chemistry through stepwise photopolymerization by forming dithioacetal bonds. The polymerized network be transformed photoreactive oligomer dissociation network-oligomer transformation is reversible, therefore allowing circular 3D using same material. Our offers flexibility modular adjustments in backbone polymer. allows access fully recyclable elastomers, crystalline polymers, and rigid glassy toughness, them potentially suitable diverse applications.
Язык: Английский
Процитировано
3
Macromolecules, Год журнала: 2024, Номер 57(3), С. 1362 - 1369
Опубликована: Фев. 5, 2024
Dynamic covalent thermosets have emerged as a next-generation sustainable plastic that combines the advantages of traditional and thermoplastics. However, dynamic generally suffer from trade-off between strength/stiffness ductility/toughness. Herein, strategy to simultaneously strengthen toughen thermosets, incorporation hydrogen-bonded (H-bonded) cross-links into networks, is reported. We designed polyimine network cross-linked by both imine bonds H-bonds, resulting in remalleable recyclable thermoset with high yield strength (ca. 55.2 MPa) Young's modulus 1.7 GPa) well ductility 72%) toughness 32.7 MJ m–3). When H-bonded are removed or replaced bonds, mechanical polyimines significantly declined, respectively. Therefore, this work provides an effective design principle for strong tough modularity recyclability.
Язык: Английский
Процитировано
14
Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 154710 - 154710
Опубликована: Авг. 13, 2024
Язык: Английский
Процитировано
12
Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown
Опубликована: Июнь 3, 2024
Covalent adaptable networks (CANs), leveraging the dynamic exchange of covalent bonds, emerge as a promising material to address challenge irreversible cross-linking in thermosetting polymers. In this work, we explore introduction catalyst-free and associative C=C/C=N metathesis reaction into polyurethanes, creating CANs with superior stability, solvent resistance, thermal/mechanical properties. By incorporating reaction, stress-relaxation is significantly accelerated compared imine-bond-only networks, rate adjustable by modifying substituents ortho position double bonds. The obtained plasticity enables recycle without altering chemical structure or mechanical properties, also found be vital for achieving shape memory functions complex spatial structures. This new crosslinker polymer has potential accelerate ongoing exploration malleable functional thermoset
Язык: Английский
Процитировано
7
Polymer Bulletin, Год журнала: 2024, Номер 81(15), С. 13901 - 13940
Опубликована: Июнь 21, 2024
Язык: Английский
Процитировано
4
Journal of the American Chemical Society, Год журнала: 2024, Номер 146(31), С. 21612 - 21622
Опубликована: Июль 24, 2024
Thermoset polymers have become integral to our daily lives due their exceptional durability, making them feasible for a myriad of applications; however, this ubiquity also raises serious environmental concerns. Covalent adaptable networks (CANs) with dynamic covalent linkages that impart efficient reprocessability and recyclability thermosets garnered increasing attention. While various exchange reactions been explored in CANs, many rely on the stimuli active nucleophilic groups and/or catalysts, introducing performance instability escalating initial investment. Herein, we propose new direct catalyst-free C═C/C═N metathesis reaction between α-cyanocinnamate aldimine as novel motif constructing recyclable thermosets. This chemistry offers mild conditions (room temperature catalyst-free), ensuring high yields simple isolation procedures. By incorporating into covalently cross-linked polymer networks, obtained exhibit both malleability reconfigurability. The resulting tunable properties, coupled thermal stability linkage-based enrich toolbox chemistry.
Язык: Английский
Процитировано
4
Polymer Bulletin, Год журнала: 2024, Номер 81(12), С. 10489 - 10532
Опубликована: Март 29, 2024
Язык: Английский
Процитировано
3
Macromolecules, Год журнала: 2024, Номер unknown
Опубликована: Окт. 1, 2024
Язык: Английский
Процитировано
3