Journal ArticleDOI
Dynamic Covalent Polymer Networks: from Old Chemistry to Modern Day Innovations.
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This work designs dynamic covalent polymer networks with unique adaptive properties for vitrimeric rheological behavior and solid-state plasticity for this type of material, and suggests a promising future for this class of materials.Abstract:
Dynamic covalent polymer networks have long been recognized. With the initial focus on the unintended impact of dynamic covalent linkages on the viscoelasticity of commercial rubbers, efforts in modern times have transitioned into designing dynamic covalent polymer networks with unique adaptive properties. Whereas self-healing and thermoset reprocessing have been the primary motivations for studying dynamic covalent polymer networks, the recent discovery of the vitrimeric rheological behavior and solid-state plasticity for this type of material have opened up new opportunities in material innovations. This, coupled with the revelation of the dynamic characteristics of commercially relevant polymer building blocks such as esters and urethanes, suggests a promising future for this class of materials.read more
Citations
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High Performance of Thermoplastic Polyurethane-Graphene Oxide Self-Healing Composite Film
Zhimin Zhou,Ke Wang,Yuehui Wang +2 more
TL;DR: In this article, the thermal properties, infrared photothermal response, and self-healing performance of the Graphene oxide (GO) TPU film were systematically investigated, and the experimental results demonstrate that the thermal conductivity of GO-TPU film with 4 wt % GO and the initial concentration of 20 wt% TPU is 0.3719 W·m−1·K−1, which is 83.8% increase compared to pure TPU.
Journal ArticleDOI
Thermal Metamorphosis in (Meth)acrylate Photopolymers: Stress Relaxation, Reshaping, and Second-Stage Reaction
Maciej Podgórski,Maciej Podgórski,Brady T. Worrell,Jasmine Sinha,Matthew K. McBride,Christopher N. Bowman +5 more
TL;DR: In this paper, a thermally transformable/responsive photopolymer network was constructed from commercial (meth)acrylate esters and synthetic di-and mono-methacylate monomers bearing thioester functionalities.
Journal ArticleDOI
Dynamic Covalent Hydrogels: Strong yet Dynamic
Yue Han,Yi Cao,Hai-yan Lei +2 more
TL;DR: This review summarizes the common dynamic covalent bonds used in hydrogel networks based on various chemical reaction mechanisms and the mechanical strength of these bonds at the single molecule level and discusses how dynamiccovalent chemistry makes hydrogels materials more dynamic from the materials perspective.
Journal ArticleDOI
Photodynamic covalent bonds regulated by visible light for soft matter materials
TL;DR: The next critical frontier in the field of photodynamic bond forming is to substantially redshift both the bond formation and cleavage reaction into biologically benign irradiation regimes that commence beyond 400 nm as mentioned in this paper .
References
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Journal ArticleDOI
Autonomic healing of polymer composites
Scott R. White,Nancy R. Sottos,Philippe H. Geubelle,Jeffrey S. Moore,Jeffrey S. Moore,Michael R. Kessler,Suresh R. Sriram,Suresh R. Sriram,Eric Brown,S. Viswanathan +9 more
TL;DR: A structural polymeric material with the ability to autonomically heal cracks is reported, which incorporates a microencapsulated healing agent that is released upon crack intrusion and polymerization of the healing agent is triggered by contact with an embedded catalyst, bonding the crack faces.
Journal ArticleDOI
Controlled/living radical polymerization: Features, developments, and perspectives
TL;DR: In this article, a review of recent mechanistic developments in the field of controlled/living radical polymerization (CRP) is presented, with particular emphasis on structure-reactivity correlations and "rules" for catalyst selection in ATRP, for chain transfer agent selection in reversible addition-fragmentation chain transfer (RAFT) polymerization, and for the selection of an appropriate mediating agent in stable free radical polymerisation (SFRP), including organic and transition metal persistent radicals.
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Self-healing and thermoreversible rubber from supramolecular assembly
TL;DR: The design and synthesis of molecules that associate together to form both chains and cross-links via hydrogen bonds and the system shows recoverable extensibility up to several hundred per cent and little creep under load are designed and synthesized.
Journal ArticleDOI
A Thermally Re-mendable Cross-Linked Polymeric Material
Xiangxu Chen,Matheus Adrianus Dam,Kanji Ono,Ajit Mal,Hongbin Shen,Steven Nutt,Kevin Sheran,Fred Wudl +7 more
TL;DR: A transparent organic polymeric material that can repeatedly mend or “re-mend” itself under mild conditions and is a tough solid at room temperature and below with mechanical properties equaling those of commercial epoxy resins.
Journal ArticleDOI
Silica-Like Malleable Materials from Permanent Organic Networks
TL;DR: In this paper, the authors designed epoxy networks that can rearrange their topology by exchange reactions without depolymerization, and showed that they are insoluble and processable.