Application environment factors

• Temperature: Excessively high or low temperatures can have an adverse effect on the adhesive. High temperatures may cause the molecular chains of the adhesive to move more vigorously, resulting in softening and degradation of the adhesive. Low temperatures, on the other hand, may make the adhesive hard and brittle, reducing its flexibility and bonding strength.
• Humidity: A high - humidity environment can cause the adhesive to absorb moisture, affecting its curing effect and reducing the bonding strength. For some water - intolerant adhesives, long - term exposure to a humid environment may also cause a hydrolysis reaction, damaging the molecular structure of the adhesive and shortening its service life.
• Chemical media: If the adhesive is in long - term contact with chemical substances such as acids, alkalis, and salts, chemical reactions may occur, leading to a decline in the performance of the adhesive. For example, in a chemical production environment, adhesives in contact with strong acids and alkalis may be corroded quickly and lose their bonding function.
• Mechanical stress: During the use process, the adhesive may be subjected to mechanical stresses such as tension, shear, and bending. Long - term exposure to relatively large mechanical stresses can cause damage such as micro - cracks and deformation within the adhesive, gradually reducing the bonding strength and shortening the service life.
• Ultraviolet radiation: Adhesives used outdoors, when exposed to sunlight for a long time, ultraviolet rays can cause photochemical reactions such as chain scission and cross - linking of the adhesive molecular chains, resulting in aging, discoloration, and embrittlement of the adhesive, reducing its bonding performance and service life.

Construction operation factors

• Amount of adhesive applied: If too much adhesive is applied, internal stress may occur during the curing of the adhesive, affecting the bonding strength. If too little adhesive is applied, a complete bonding layer cannot be formed, resulting in poor bonding, both of which will affect the service life of the adhesive.
• Curing conditions: Curing conditions such as curing temperature, humidity, and time are crucial to the performance of the adhesive. For example, if the curing temperature is too low or the time is too short, the adhesive may not cure completely, and the degree of cross - linking of the molecular chains is insufficient, resulting in low bonding strength and shortening the service life.
• Construction process: Whether the operation during the construction process is standardized will also affect the service life of the adhesive. For example, uneven application of the adhesive or insufficient mixing of the adhesive will create local weak points in the adhesive during use, reducing the overall bonding effect and service life.