Fluoride‐Catalyzed Siloxane Exchange as a Robust Dynamic Chemistry for High‐Performance Vitrimers
Fluoride‐Catalyzed Siloxane Exchange as a Robust Dynamic Chemistry for High‐Performance Vitrimers
复制标题
氟化物催化硅氧烷交换作为高性能 Vitrimer 的稳健动态化学
DOI：
10.1002/adma.202303280
复制
发表时间：
2023
影响因子：
29.4
通讯作者：
Guan, Zhibin
中科院分区：
文献类型：
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作者：
Tretbar, Chase;Castro, Jordan;Yokoyama, Kosuke;Guan, Zhibin
新技术的可持续发展要求材料具有先进的物理和化学性能，同时保持可再加工性和可回收性。玻璃聚合物是为此目的而设计的;然而，它们的动态共价化学通常具有缺点或限于专用聚合物。在这里，氟化物催化的硅氧烷交换被报道为通过工业加工商品聚合物（如聚（甲基丙烯酸甲酯），聚乙烯和聚丙烯）可规模化生产高性能玻璃化聚合物的一种非常稳健的化学方法。该玻璃化物显示出改善的抗蠕变、耐热、抗氧化和抗水解性，同时保持优异的熔体流动性以用于加工和回收。此外，在机械共混期间不同玻璃化聚合物之间的硅氧烷交换导致在没有任何增容剂的情况下的自增容共混物。这为生产可持续的高性能玻璃聚合物提供了一种通用的、可扩展的方法，并为回收混合塑料废物提供了一种新的策略。
Sustainable development of new technologies requires materials having advanced physical and chemical properties while maintaining reprocessability and recyclability. Vitrimers are designed for this purpose; however, their dynamic covalent chemistries often have drawbacks or are limited to specialized polymers. Here, fluoride‐catalyzed siloxane exchange is reported as an exceptionally robust chemistry for scalable production of high‐performance vitrimers through industrial processing of commodity polymers such as poly(methyl methacrylate), polyethylene, and polypropylene. The vitrimers show improved resistance to creep, heat, oxidation, and hydrolysis, while maintaining excellent melt flow for processing and recycling. Furthermore, the siloxane exchange between different vitrimers during mechanical blending results in self‐compatibilized blends without any compatibilizers. This offers a general, scalable method for producing sustainable high‐performance vitrimers and a new strategy for recycling mixed plastic wastes.
医药与材料
DOI：
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发表时间：
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期刊：
影响因子：
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作者：
K. M. Akhoon;D. Myles
通讯作者：
D. Myles