Self-healing behaviour of furan-maleimide poly(ionic liquid) covalent adaptable networks

Poly(ionic liquid) covalently adaptable networks containing thermoreversible furan-maleimide linkages were prepared and characterized for their thermal, mechanical and conductive properties. Self-healing behaviour was initially evaluated using oscillatory rheology where a G ′/ G ′′ crossover tempera...

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Bibliographic Details
Published in:Polymer chemistry 2020-09, Vol.11 (33), p.5321-5326
Main Authors: Lindenmeyer, Katelyn M, Johnson, R. Daniel, Miller, Kevin M
Format: Article
Language:English
Subjects:
Conductivity
Crossovers
Dielectric relaxation
Ionic liquids
Ions
Polymer chemistry
Recovery
Rheological properties
Rheology
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Summary:Poly(ionic liquid) covalently adaptable networks containing thermoreversible furan-maleimide linkages were prepared and characterized for their thermal, mechanical and conductive properties. Self-healing behaviour was initially evaluated using oscillatory rheology where a G ′/ G ′′ crossover temperature of ∼110 °C was observed. Anhydrous conductivities, as determined by dielectric relaxation spectroscopy, were found to be on the order of 10 −8 S cm −1 at 30 °C. Recovery of >70% of the original stress and strain at break was found within 2 hours at 105 °C as determined from tensile testing experiments, with breakage occurring at a new point on the film. Recovery of conductivity was completed utilizing chronoamperometric cycling whereby >75% of the original current was recovered within two hours at 110 °C. Recovery of mechanical (tensile testing) and conductive (chronoamperometric cycling) properties was observed for PIL networks containing thermoreversible furan-maleimide crosslinks.
ISSN:1759-9954
1759-9962
DOI:10.1039/d0py00016g