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- W2898033975 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 CN 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 CN 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 CN transalkylation of pyridinium possesses significant potential in broadening the gallery of vitrimer materials." @default.
- W2898033975 created "2018-10-26" @default.
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- W2898033975 date "2018-11-01" @default.
- W2898033975 modified "2023-10-14" @default.
- W2898033975 title "Reprocessable and robust crosslinked elastomers via interfacial C N transalkylation of pyridinium" @default.
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- W2898033975 doi "https://doi.org/10.1016/j.compscitech.2018.10.017" @default.
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