Adaptable Crosslinks in Polymeric Materials: Resolving the Intersection of Thermoplastics and Thermosets

Scheutz, Georg M.; Lessard, Jacob J.; Sims, Michael B.; Sumerlin, Brent S.

doi:10.1021/jacs.9b07922

Cited by 934Polymer composites and self-healingEpoxy Resin Curing ProcessesAdvanced Polymer Synthesis and Characterization

Adaptable Crosslinks in Polymeric Materials: Resolving the Intersection of Thermoplastics and Thermosets

Scheutz, Georg M., Lessard, Jacob J., Sims, Michael B., Sumerlin, Brent S.·2019·Journal of the American Chemical Society

DOI 10.1021/jacs.9b07922

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Abstract

The classical division of polymeric materials into thermoplastics and thermosets based on covalent network structure often implies that these categories are distinct and irreconcilable. Yet, the past two decades have seen extensive development of materials that bridge this gap through incorporation of dynamic crosslinks, enabling them to behave as both robust networks and moldable plastics. Although their potential utility is significant, the growth of covalent adaptable networks (CANs) has obscured the line between "thermoplastic" and "thermoset" and erected a conceptual barrier to the growing number of new researchers entering this discipline. This Perspective aims to both outline the fundamental theory of CANs and provide a critical assessment of their current status. We emphasize throughout that the unique properties of CANs emerge from the network chemistry, and particularly highlight the role that the crosslink exchange mechanism (i.e., dissociative exchange or associative exchange) plays in the resultant material properties under processing conditions. Predominant focus will be on thermally induced dynamic behavior, as the majority of presently employed exchange chemistries rely on thermal stimulus, and it is simple to apply to bulk materials. Lastly, this Perspective aims to identify current issues and address possible solutions for better fundamental understanding within this field.

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Dynamic covalent polymer networks exhibit adaptive properties such as self-healing, reprocessing, and permanent shape reconfiguration that are not present in typical covalent networks.
“dynamic covalent polymer network10–12 exhibits adaptive properties not present in typical covalent networks such as self-healing, reprocessing, and permanent shape reconfiguration.”
From On demand shape memory polymer via light regulated topological defects in a dynamic covalent network (2020) · cites this paper as [12]

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Authors: Scheutz, G. M., Lessard, J. J., Sims, M. B., & Sumerlin, B. S.
Affiliations: University of Florida (US)
Corresponding author: Sumerlin, Brent S.
ORCID: Scheutz, Georg M.
Lessard, Jacob J.
Sims, Michael B.
Sumerlin, Brent S.
Venue: Journal of the American Chemical Society
Publisher: American Chemical Society (ACS)
Published: 2019-09-16
Volume: 141
Issue: 41
Pages: 16181-16196
ISSN: 0002-7863 (ISSN-L)
1520-5126
DOI: 10.1021/jacs.9b07922
OpenAlex: W2973242012
Cited by: 934
References: 115
Citations by year: 2026: 125 · 2025: 160 · 2024: 160 · 2023: 152 · 2022: 143 · 2021: 89 · 2020: 96 · 2019: 9
FWCI: 35.98
Type: journal article
Language: en
Open access: closed
Licence: doi.org/10.15223/policy-029 (stm-asf)
doi.org/10.15223/policy-037 (stm-asf)
doi.org/10.15223/policy-045 (stm-asf)
Locations: Journal of the American Chemical Society (publishedVersion)
PubMed (publishedVersion)
Funders: Division of Materials Research (DMR-1904631)
Topics: Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
Physical Sciences › Engineering › Mechanical Engineering › Epoxy Resin Curing Processes
Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
Keywords: covalent adaptable networks, thermoplastics, thermosetting resins, thermal stimuli

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Adaptable Crosslinks in Polymeric Materials: Resolving the Intersection of Thermoplastics and Thermosets

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