Source 1review2019Annual Review of Chemical and Biomolecular Engineering
Toolkit/covalent adaptable networks
covalent adaptable networks
Also known as: CANs
Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
Bridging this divide, covalent adaptable networks (CANs) structurally resemble thermosets with permanent covalent crosslinks but are able to flow in a manner that resembles thermoplastic behavior only when a dynamic chemical reaction is active.
Usefulness & Problems
Why this is useful
Covalent adaptable networks are crosslinked polymer networks that retain thermoset-like covalent connectivity yet can flow when dynamic bond exchange is activated. The review frames them as materials whose rheology and viscoelasticity are governed by exchange kinetics and triggering stimuli.; tuning viscoelastic properties; improving mechanical properties; improving polymer processing; enabling reprocessable crosslinked materials
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Covalent adaptable networks are crosslinked polymer networks that retain thermoset-like covalent connectivity yet can flow when dynamic bond exchange is activated. The review frames them as materials whose rheology and viscoelasticity are governed by exchange kinetics and triggering stimuli.
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tuning viscoelastic properties
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improving mechanical properties
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improving polymer processing
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enabling reprocessable crosslinked materials
Problem solved
They address the usual tradeoff between permanently crosslinked thermosets and reprocessable thermoplastics by enabling conditional flow in a covalently crosslinked material. This supports improved processing and mechanical performance in multiple polymer application areas.; bridging thermoset-like crosslinking with thermoplastic-like flow behavior; linking material flow behavior to controllable dynamic reaction kinetics and external stimuli
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They address the usual tradeoff between permanently crosslinked thermosets and reprocessable thermoplastics by enabling conditional flow in a covalently crosslinked material. This supports improved processing and mechanical performance in multiple polymer application areas.
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bridging thermoset-like crosslinking with thermoplastic-like flow behavior
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linking material flow behavior to controllable dynamic reaction kinetics and external stimuli
Problem links
bridging thermoset-like crosslinking with thermoplastic-like flow behavior
LiteratureThey address the usual tradeoff between permanently crosslinked thermosets and reprocessable thermoplastics by enabling conditional flow in a covalently crosslinked material. This supports improved processing and mechanical performance in multiple polymer application areas.
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They address the usual tradeoff between permanently crosslinked thermosets and reprocessable thermoplastics by enabling conditional flow in a covalently crosslinked material. This supports improved processing and mechanical performance in multiple polymer application areas.
linking material flow behavior to controllable dynamic reaction kinetics and external stimuli
LiteratureThey address the usual tradeoff between permanently crosslinked thermosets and reprocessable thermoplastics by enabling conditional flow in a covalently crosslinked material. This supports improved processing and mechanical performance in multiple polymer application areas.
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They address the usual tradeoff between permanently crosslinked thermosets and reprocessable thermoplastics by enabling conditional flow in a covalently crosslinked material. This supports improved processing and mechanical performance in multiple polymer application areas.
Taxonomy & Function
Primary hierarchy
Mechanism Branch
Architecture: A reusable architecture pattern for arranging parts into an engineered system.
Techniques
Structural CharacterizationTarget processes
No target processes tagged yet.
Input: Light
Implementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationimplementation constraint: spectral hardware requirementoperating role: actuator
Implementation requires a polymer network containing dynamic covalent chemistry and a trigger that activates exchange, such as temperature, light, or a chemical stimulus. The abstract does not specify particular monomers, catalysts, or fabrication methods.; requires a dynamic chemical reaction within the network; requires suitable triggering conditions such as temperature, light, or chemical stimuli
The abstract does not support claims that CANs universally solve all durability, manufacturability, or recycling problems. It also indicates that flow depends on activating the dynamic reaction, so they are not simply fluid under all conditions.; flow occurs only when a dynamic chemical reaction is active; material behavior is intrinsically tied to exchange kinetics and triggering stimuli
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Covalent adaptable networks are presented as materials that can improve mechanical properties and processing in polymer applications including composites, hydrogels, and shape-memory polymers.
Covalent adaptable networks combine thermoset-like permanent covalent crosslinks with thermoplastic-like flow when a dynamic chemical reaction is active.
The rheological behavior of covalent adaptable networks is intrinsically tied to dynamic reaction kinetics and to triggering stimuli such as temperature, light, and chemical inputs.
Approval Evidence
1 source3 linked approval claimsfirst-pass slug covalent-adaptable-networks
Bridging this divide, covalent adaptable networks (CANs) structurally resemble thermosets with permanent covalent crosslinks but are able to flow in a manner that resembles thermoplastic behavior only when a dynamic chemical reaction is active.
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application scope summarysupports
Covalent adaptable networks are presented as materials that can improve mechanical properties and processing in polymer applications including composites, hydrogels, and shape-memory polymers.
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material property summarysupports
Covalent adaptable networks combine thermoset-like permanent covalent crosslinks with thermoplastic-like flow when a dynamic chemical reaction is active.
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mechanism property linksupports
The rheological behavior of covalent adaptable networks is intrinsically tied to dynamic reaction kinetics and to triggering stimuli such as temperature, light, and chemical inputs.
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Comparisons
Source-stated alternatives
The abstract explicitly contrasts CANs with thermoset and thermoplastic polymers. The supplied research summary also identifies vitrimers and dynamic covalent polymer networks as closely related classes, but the abstract itself does not elaborate their comparative performance.
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The abstract explicitly contrasts CANs with thermoset and thermoplastic polymers. The supplied research summary also identifies vitrimers and dynamic covalent polymer networks as closely related classes, but the abstract itself does not elaborate their comparative performance.
Source-backed strengths
combine permanent covalent crosslinks with conditional flow; provide control over rheological and viscoelastic behavior through stimuli and reaction kinetics; applicable across composites, hydrogels, and shape-memory polymers
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combine permanent covalent crosslinks with conditional flow
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provide control over rheological and viscoelastic behavior through stimuli and reaction kinetics
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applicable across composites, hydrogels, and shape-memory polymers
Compared with mMORp
covalent adaptable networks and mMORp address a similar problem space.
Shared frame: same top-level item type; same primary input modality: light
Compared with optogenetic probes
covalent adaptable networks and optogenetic probes address a similar problem space.
Shared frame: same top-level item type; same primary input modality: light
Compared with organoid fusion
covalent adaptable networks and organoid fusion address a similar problem space.
Shared frame: same top-level item type; same primary input modality: light
Ranked Citations
- 1.