Explanation

adhesive strength, also known as bonding strength, refers to the force or energy required to put on the bonding joint per unit area or length until it is destroyed. Generally, the adhesive strength is evaluated from the perspective of joint failure. adhesive strength is affected by many factors, including physical and chemical factors such as the nature of materials, the strength of adhesive, the strength of bonded materials, the state of bonding interface, the thickness of bonding layer, chemical properties and bonding conditions. All these factors affect the adhesive strength. At the bonding interface, the basic adhesion force is generated by the intermolecular interactions. However, in practice, adhesive strength is usually considered only from the perspective of joint failure. The damage can be real interface damage, cohesive failure or weak interface (WBL) damage. Therefore, simply considering the bonding force on the interface is not enough to explain the adhesive strength, because the failure mechanism also needs to be considered. There are many factors that affect the adhesive strength, including the strength of adhesive, the strength of the bonded material, the thickness of the bonding layer, the density of the interface point contact, the chemical properties of adhesive and the bonded material, the chemical conditions when bonding, the use environment and other physical chemistry factors. If a bonded joint is subjected to failure testing under specific environmental conditions, the required failure force is called the environmental strength of the bonded joint, as environmental conditions can also have a significant impact on the bonding performance.

Classification