Traditional polymer with network structures possess stable and excellent performance

however

once damaged

they cannot be self-healing and reprocessing. Currently

most of the monomers originated from non-renewable coal and petroleum resources

which aggravates the crisis of non-renewable resources. Vitrimer featured with reversible covalent crosslinking networks can be rearranged its network under external stimulation to promote its reprocessing and self-healing capability. In this work

epoxy vitrimers were prepared by epoxy-thiol "click" reaction between epoxy soybean oil with abundant epoxy group as matrix and BDB (2

2'-(1

4-Phenylene)-bis[4-mercaptan1

3

2-dioxaborolane]) with —SH group as crosslinking agent. The effect of the content of crosslinking agent on the structure and properties of vitrimer polymer was studied. When the epoxy group and thiol was equivalent

the vitrimer polymer displayed the best properties (excellent reprocessing

self-healing

and welding ability).