Polydimethylsiloxane quenchable vitrimers

An elastomeric vitrimer material was synthesized via the crosslinking of a polydimethylsiloxane bearing pendant amino functions with a bis-vinylogous urethane crosslinker. The elastic properties of this material could be tuned across a wide range of moduli by varying crosslink density. Reshaping and...

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Bibliographic Details
Published in:Polymer chemistry 2017-01, Vol.8 (43), p.6590-6593
Main Authors: Stukenbroeker, Tyler, Wang, Wendi, Winne, Johan M., Du Prez, Filip E., Nicolaÿ, Renaud, Leibler, Ludwik
Format: Article
Language:English
Subjects:
Castability
Chemical Sciences
Crosslinking
Design for recycling
Elastic properties
Elastomers
Masking
Physics
Polydimethylsiloxane
Polymer chemistry
Recyclability
Vitrimers
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Summary:An elastomeric vitrimer material was synthesized via the crosslinking of a polydimethylsiloxane bearing pendant amino functions with a bis-vinylogous urethane crosslinker. The elastic properties of this material could be tuned across a wide range of moduli by varying crosslink density. Reshaping and recyclability were observed at 100 °C. Further investigation of the dynamic character revealed double relaxations, which could be supressed by masking free amino groups. Finally, these studies led to the development of a single-pot, solution-castable formulation of a non-dynamic permanent elastomer. These results open a way for the design of quenchable vitrimers, that is to say crosslinked materials which after shaping or recycling exhibit conventional elastomer properties.
ISSN:1759-9954
1759-9962
DOI:10.1039/C7PY01488K