Vitrimer design using epoxy molecules

Abstract

To advance the international slogan of sustainable development goals (SDGs), both industry and academic researchers have committed themselves to the development of sustainable materials. Traditionally, cross-linked polymer materials have encountered significant limitations in recyclability due to the presence of covalent bonds that confer a permanent life time. To address this issue, the integration of dynamic covalent bonds into network structures has emerged as a promising strategy,enabling sustainable functions such as recyclability and healability. Recently, a novel type of dynamic covalent bond has been developed that facilitates associative bond exchange without the distinct steps of bond dissociation and reassociation. These materials, referred to as vitrimers, have garnered considerable attention due to the unique functions and physical properties as well as the sustainability. This article outlines the characteristics and advantageous functionalities associated with the vitrimer concept. Additionally, we summarize examples of epoxy-based vitrimers and upcycling transformation systems involving commodity polyesters.