文章基本信息

标题：Vitrimerization: A Novel Concept to Reprocess and Recycle Thermoset Waste via Dynamic Chemistry
本地全文：下载
作者：Liang Yue ; Vahab Solouki Bonab ; Dian Yuan 等
期刊名称：Global Challenges
印刷版ISSN：2056-6646
电子版ISSN：2056-6646
出版年度：2019
卷号：3
期号：7
页码：1-6
DOI：10.1002/gch2.201800076
语种：English
出版社：John Wiley & Sons, Ltd
摘要：AbstractA new approach for reprocessing of existing thermoset waste is presented. This work demonstrates that unrecyclable thermoset materials can be reprocessed using the concept of associative dynamic bonding, vitrimers. The developed recycling methodology relies on swelling the thermoset network into a solution of a catalyst, which enables transesterification reactions allowing dynamic bond exchange between ester and hydroxyl groups within the thermoset network. Thermal and mechanical properties for recycled polyurethane and epoxy networks are studied and a strategy to maintain the properties of recycled materials is discussed. The developed methodology promises recycling and even upcycling and reprocessing of previously thought intractable materials. Moreover, processability of vitrimerized thermosets with common thermoplastic manufacturing methods opens up the possibility of tuning recycled networks by adding nanoparticles. This flexibility keeps the application window of recycled thermosets very broad.A method of transforming a permanent, covalent network into a dynamic one capable of being reprocessed and recycledis developed. While this method is inspired by dynamic bonding in vitrimers, it differentiates itself by focusing on already‐formed, existing thermosets. Vitrimerization has the potential to broaden the large scale impact of vitrimers to solve an existing pressing problem of thermoset waste.
关键词：dynamic bondingnanocompositesrecyclingthermoset wastevitrimers