Elaplus tells you, how do temperature and humidity affect adhesives?

Temperature and humidity are important environmental factors that affect the performance of adhesives. They play a crucial role in the application of adhesives, directly affecting their curing, bonding strength, durability, and reliability. Here are several aspects of how temperature and humidity affect adhesives:1、 The influence of temperature on adhesivesThe influence of temperature on adhesives is mainly reflected in curing speed, bonding strength, toughness, and durability.How do temperature and humidity affect adhesives (1) Curing processHigh temperature: High temperature can accelerate the curing reaction of certain adhesives (such as epoxy resin, polyurethane, etc.). Most thermosetting adhesives cure faster at higher temperatures, which is very useful in some fast-paced industrial processes. However, excessively high temperatures may cause excessive reaction or incomplete curing of the adhesive, affecting its final performance.Low temperature: At low temperatures, the curing process of adhesives usually slows down, and some adhesives may not fully cure, resulting in insufficient bonding strength. Especially thermosetting adhesives, their curing speed and performance will significantly decrease at low temperatures. Low temperature may also make the adhesive more viscous, affecting the operability of glue application.(2) Adhesive strength and toughnessHigh temperature: At high temperatures, the bonding strength and stiffness of many adhesives will weaken, especially thermoplastic adhesives, which are prone to softening or plasticization, leading to a decrease in bonding strength. Some adhesives may fail when the temperature exceeds their tolerance limit.Low temperature: Low temperature may cause some adhesives to become brittle, reducing their bonding strength and toughness. Especially for rubber based adhesives and other low-temperature curing adhesives, they may become prone to cracking in cold environments.(3) Thermal expansion and contractionTemperature changes: Temperature changes can cause differences in the thermal expansion coefficients of adhesives and substrates, which may lead to stress concentration at the bonding interface and affect the bonding strength. For example, when the temperature rises,…