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Reprocessable and robust crosslinked elastomers via interfacial C[sbnd]N transalkylation of pyridinium.
- Source :
-
Composites Science & Technology . Nov2018, Vol. 168, p320-326. 7p. - Publication Year :
- 2018
-
Abstract
- Abstract Covalently cross-linked elastomers with high elasticity are widely found in daily life and high-tech areas. However, the irreversibility of the crosslinked networks hinders the rubber products from reprocessing or recycling, causing a major environmental problem. Recently developed vitrimer chemistry provides fantastic avenues for cross-linked elastomers to achieve full reprocessability and recyclability. Herein, we disclose a novel C N transalkylation of pyridinium by model studies and implant this chemistry into the interfaces of an elastomeric composite. As a proof of concept, (3-bromopropyl)trimethoxysilane modified silica was used to crosslink butadiene-styrene-vinylpyridine rubber, forming pyridiniums in the interfaces. The composites were prepared by straightforward mechanical compounding and subsequent hot-pressing. Because of the covalent interfacial bridges and excellent dispersion of silica, the composites possess robust mechanical properties. Furthermore, the C N transalkylation reactions of pyridiniums at elevated temperature endows the composites with vitrimer properties, such as malleability and reprocessability. As the pyridine moieties can be easily introduced into a great variety of commercial polymers, we envision this newly demonstrated C N transalkylation of pyridinium possesses significant potential in broadening the gallery of vitrimer materials. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELASTOMERS
*PYRIDINIUM compounds
*COMPOSITE materials
*ROBUST control
*POLYMERS
Subjects
Details
- Language :
- English
- ISSN :
- 02663538
- Volume :
- 168
- Database :
- Academic Search Index
- Journal :
- Composites Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 132941436
- Full Text :
- https://doi.org/10.1016/j.compscitech.2018.10.017