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A good adhesive not only has the cohesive force of the interface layer to be greater than the cohesive force of the adherend(brown fused alumina), but also the cohesion of itself (internal) is greater than the cohesive force of the adherend, so that the adhesive joint can obtain the highest strength. The adhesion is affected by the peeling speed of the adhesive layer(synthetic corundum). Help pick up the image(such as glass, etc.).

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Although there is a mechanical coupling force between the adhesive and the adherend at the bonding interface, the bonding effect that occurs in the boundary area is still dominated by the force between ions(brown aluminum oxide). After the glue is applied to the surface of the dry adherend, due to diffusion, it penetrates into the pores, it sings or disperses with the dry matter, such as the mechanical effect of "money" and "hook"(emery abrasive).

The surface of the material to be bonded has a certain degree of coarse sugar during bonding(brown fused alumina price), which can improve the bonding strength, and the effect of the adhesive with high elastic modulus is more significant. However, the mechanical theory cannot explain the bonding of some non-porous, very smooth surfaces(180 grit aluminum oxide), or the bonding phenomenon caused by the changing surface chemical properties of the material.

Therefore, when changing the properties of the surface atoms that can accelerate the cracking of the polymer(green silicon carbide), it may be important for the heat-resistant oxidation of the bonding system. The basis of diffusion theory is the basic characteristics of polymer compounds (molecular chain structure and flexibility(80 grit aluminum oxide blasting media), ability to do Brownian motion) and the existence of polar groups in ionomer compounds. 

Generally, adhesives have small molecular weight and many branches, so diffusion needs The activation energy is low, so the adhesion is good(white alumina). The various forces that may occur in the interface area are briefly described below(aluminum oxide blasting abrasive). Analysis of the bonding interface shows that the formation of a bonding structure is affected by two forces, namely the cohesion of the material itself and the adhesion of the interface layer.

Changed the chemical structure of the surface and increased the surface free energy, because the surface improved the bonding performance(black silicon carbide). First, the surface should be clean and clean, and more importantly, it must have a suitable surface chemical structure(aluminium oxide abrasive grit). The surface chemical structure not only requires good stability and cohesive strength, but also considers that it does not degrade the adhesive.

Due to the difference in the chemical structure of the surface layer(aluminum oxide abrasive), it can not only cause changes in the physical and chemical properties of the surface, but also cause changes in the cohesive strength of the surface layer, which has a significant impact on the adhesion performance(fine grit aluminum oxide). It can be seen that a clean surface is a necessary condition for obtaining good bonding strength, but it is not a sufficient condition.

Further understanding of the relationship between the chemical structure of the surface layer and the bonding strength should be the focus of future research on the surface treatment of the adhered material(aluminum oxide grit). The surface roughness and surface morphology are also important factors that cannot be ignored(aluminium oxide blasting grit). Attention. The reason is inseparable from the mechanical action, and after curing, atoms or molecules.