Epoxy resin has excellent electrical insulation properties

heat resistance

and mechanical strength

and is widely used in electrical equipment

however

it is difficult for the traditional epoxy resin cured to recycle and remanufacture; meanwhile

with the introduction of dynamic bonding and catalysts

epoxy resin recycling is also gradually possible

however

the direct introduction of catalysts will affect the intrinsic properties of the resin and other materials

the traditional hot-pressing recycling of epoxy resin requires the particles required for traditional hot press recycling to be small

and the cost of industrial recycling is high. In this paper

we propose a direct composite of TBD and dual-cured resin recycling particles to enhance the dynamic restructuring of the interpenetrating network

which retains the excellent properties of the epoxy resin itself and achieves a good recycling effect of the epoxy resin in large particles; moreover

we study the mechanical and dielectric properties of the recycled specimens with large-size recycling particles under different hot-pressing conditions. The results show that mixing TBD with crushed particles of dual-cured resin and then hot-pressing the recycled particles can improve the interfacial healing ability of the large-size recycled dual-cured epoxy resin without affecting its original properties. The bending strength of the sample containing 2% TBD was recovered to 46.0 MPa

with a performance recovery rate of 51.68%; the breakdown strength was recovered to 21.7 kV

with a performance recovery rate of 66.98%.Thus the problem of high cost and difficulty of traditional epoxy resin recycling can be effectively solved.