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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Journal ArticleDOI
Superior Toughness and Fast Self-Healing at Room Temperature Engineered by Transparent Elastomers
Seon-Mi Kim,Hyeonyeol Jeon,Sung-Ho Shin,Seul-A Park,Jonggeon Jegal,Sung Yeon Hwang,Dongyeop X. Oh,Jeyoung Park +7 more
TL;DR: A transparent and easily processable thermoplastic polyurethane with the highest reported tensile strength and toughness is prepared and the demonstration of a scratch-detecting electrical sensor coated on a tough TPU film capable of auto-repair at room temperature suggests that this film has potential applications in the wearable electronics industry.
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Dynamic Covalent Bonds in Polymeric Materials
TL;DR: This Minireview summarizes commonly used powerful DCBs formed by simple, often "click" reactions, and highlights the powerful materials that can result.
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Hydrogel Adhesion: A Supramolecular Synergy of Chemistry, Topology, and Mechanics
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Dynamic Covalent Polymer Networks: A Molecular Platform for Designing Functions beyond Chemical Recycling and Self-Healing.
TL;DR: In this article, the authors provide an overview of the above progress with particular focus on molecular design strategies for the exploitation of functional material properties, and point out the remaining issues and offer perspectives on how this class of materials can shape the future in ways that are complementary with classical thermoplastic and thermoset polymers.
Journal ArticleDOI
Dynamic covalent chemistry in polymer networks: a mechanistic perspective
TL;DR: In this article, a selection of such chemistries is highlighted, with a particular focus on the reaction mechanisms of molecular network rearrangements, and on how various mechanistic profiles can be related to the mechanical and physicochemical properties of polymer materials, in particular in relation with vitrimers, the recently defined third category of polymeric materials.
References
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Journal ArticleDOI
Dual-Triggered and Thermally Reconfigurable Shape Memory Graphene-Vitrimer Composites.
TL;DR: Graphene serves as energy convertor to convert near-infrared (NIR) irradiation into thermal energy to induce a helix shape sample that is recovered totally within 80 s sequent NIR irradiation.
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Photomobile Liquid-Crystalline Elastomers with Rearrangeable Networks
TL;DR: The reshaped samples show various sophisticated 3D motions upon irradiation with UV and visible light, depending on their initial shapes, even after the formation of chemically crosslinked networks.
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Exploring Dynamic Equilibrium of Diels–Alder Reaction for Solid State Plasticity in Remoldable Shape Memory Polymer Network
TL;DR: In this paper, shape memory polymers (SMPs) containing DA moieties in the networks were synthesized, and it was shown that such a network can undergo plastic deformation in its solid state at intermediate temperatures (60-100 °C) by taking advantage of its dynamic equilibrium for network topological rearrangement.
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Fifteen chemistries for autonomous external self-healing polymers and composites
TL;DR: In this paper, the fifteen most important chemistries used in autonomous external self-healing systems until today, together with their healing potential for different matrix materials and types of mechanical damage.
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Stress Relaxation Studies of the Viscoelastic Properties of Polymers
TL;DR: In this article, extensive studies of the viscoelastic properties of polymers undertaken in the author's laboratory by means of the method of stress relaxation are reviewed and a rather complete over-all picture of these phenomena seems to be emerging.