Journal ArticleDOI
Dynamic Covalent Polymer Networks: from Old Chemistry to Modern Day Innovations.
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TLDR
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
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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
Thermoreversibly crosslinked poly(ε-caprolactone) as recyclable shape-memory polymer network.
Thomas Defize,Raphaël Riva,Jean-Marie Raquez,Philippe Dubois,Christine Jérôme,Michaël Alexandre +5 more
TL;DR: A new concept to build shape memory polymers (SMP) combining outstanding fixity and recovery ratios (both above 99% after only one training cycle) typical of chemically crosslinked SMPs with reprocessability restricted to physically crosslinkedSMPs is demonstrated by covalently bonding.
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Mechanophotopatterning on a photoresponsive elastomer.
TL;DR: Mechanophotopatterning on a photoresponsive elastomer is introduced and enables for the first time the ability to precisely and simultaneously manipulate both material shape and surface topography by exposure to light without the need for solvents, molding, or physical contact.
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Chemical Stress-Relaxation of Polydimethylsiloxane Elastomers1
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Degradable epoxy resins prepared from diepoxide monomer with dynamic covalent disulfide linkage
TL;DR: In this paper, the authors demonstrate the efficient degradation of epoxy resins with disulfide linkages synthesized from bis(4-glycidyloxyphenyl)disulfide and several diamines.
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Photoresponsive Liquid Crystalline Epoxy Networks with Shape Memory Behavior and Dynamic Ester Bonds
TL;DR: A simple route to incorporate three functional building blocks into an epoxy-based liquid crystalline network (LCN), in which an azobenzene-based epoxy monomer is polymerized with an aliphatic dicarboxylic acid to create exchangeable ester bonds that can be thermally activated.