聚合物
材料科学
耐化学性
造型(装饰)
聚乙烯
聚苯乙烯
甲基丙烯酸酯
热稳定性
挤压
化学工程
高分子科学
纳米技术
复合材料
有机化学
聚合
化学
工程类
作者
Max Röttger,Trystan Domenech,Rob van der Weegen,Antoine Breuillac,Renaud Nicolaÿ,Ludwik Leibler
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2017-04-06
卷期号:356 (6333): 62-65
被引量:1019
标识
DOI:10.1126/science.aah5281
摘要
Windmills, cars, and dental restoration demand polymer materials and composites that are easy to process, assemble, and recycle while exhibiting outstanding mechanical, thermal, and chemical resistance. Vitrimers, which are polymer networks able to shuffle chemical bonds through exchange reactions, could address these demands if they were prepared from existing plastics and processed with fast production rates and current equipment. We report the metathesis of dioxaborolanes, which is rapid and thermally robust, and use it to prepare vitrimers from polymers as different as poly(methyl methacrylate), polystyrene, and high-density polyethylene that, although permanently cross-linked, can be processed multiple times by means of extrusion or injection molding. They show superior chemical resistance and dimensional stability and can be efficiently assembled. The strategy is applicable to polymers with backbones made of carbon-carbon single bonds.
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