After many tests, it has been proved that the reason why the coupling agent can improve the durability of the filler can be attributed to the following aspects.

        First, the bonding interface forms chemical bonds or hydrogen bonds, making the interface stronger and more stable.

        Secondly, the coupling agent changes the bonding properties of the epoxy resin and the filler, and increases the cohesive strength of the adhesive layer, thereby forming a new interface between the epoxy adhesive and the adherend and the polysiloxane, preventing moisture and moisture Penetrates into the interface, enhancing resistance to environmental corrosion.

        Furthermore, the coupling agent reacts with the epoxy resin and the surface to be adhered to form a chemical bond, which increases the adhesive force and improves the adhesive strength.

        In addition, the coupling agent reduces the viscosity and surface tension of the epoxy adhesive system and improves the wettability of the adherend. The coupling agent has a certain selectivity, that is to say, it is not a coupling agent that can be completely suitable for any system, but needs to be matched. The acidity and alkalinity of the system should be considered.