Malleable organic/inorganic thermosetting hybrids enabled by exchangeable silyl ether interfaces

Abstract

Interfacial silyl ether networks can reshuffle the topological structure upon trans-oxyalkylation reactions, enabling malleability and recyclability to organic/inorganic hybrid vitrimers.

A catalyst-free and recycle-reinforcing elastomer vitrimer with exchangeable links

“…Similar results have been reported in other elastomer vitrimers. [45][46][47][48] Fig . 5b shows the storage modulus of the original and recycled of XNBR-50s as a function of temperature.…”

Reprocessable and Shape Memory Thermosetting Epoxy Resins Based on Silyl Ether Equilibration

“…However, the variety of monomers is so limited that this dynamic bonds cannot be widely used in common polymers, such as polyurethane, polyacrylic acid, and epoxy thermoset. Recently, the malleability between inorganic precipitated silica and epoxidized rubber was reported . The tensile strength of ES‐20, a typical sample in previous study, shows a tensile strength less than 12 MPa.…”

“…Dynamic covalent network materials, combining the advantages of both cross‐linked and non‐crosslinked polymers, have been studied extensively all over the world . Dynamic covalent networks can rearrange their topology without depolymerization under certain conditions . They exhibit cross‐linked structure like thermoset materials at low temperatures and can flow and be reprocessed like traditional thermoplastic materials, and the flowing capacity is based on cross‐linked bond exchange mechanism .…”

Vitrimers: directing chemical reactivity to control material properties

“…As materials, part of the excitement for the developments in the area of vitrimers is also driven by the fact that they also hold promise as thermoset substitutes for the development of weldable, recyclable and reshapable composites. 76 Therefore, the development of vitrimer (nano)composites have attracted considerable interest in the past few years, as demonstrated by the numerous varieties of already implemented reinforcing agents, such as glass and carbon bers, 77-81 silica and aluminabased llers, [82][83][84][85][86][87][88][89] carbon dots and nanotubes, [90][91][92][93][94][95] graphene, [96][97][98][99] cellulose, 100 nanocrystals, 101 etc. 102 The most frequently reported systems used in this context are based on the original trans-esterication vitrimer chemistry, because of the widespread commercially available hydroxy-functionalized llers.…”