Coupling agents: Compounds that can form a certain binding force with both polar and nonpolar substances, characterized by having both polar and nonpolar parts in their molecules. Silane coupling agents are commonly used in adhesives.
Functions of coupling agents: To increase the intermolecular forces within the main resin, enhancing the cohesive strength of the adhesive; to increase the bonding between the resin and the adherend, playing a certain bridging role. Different coupling agents have different reactive groups, and the different reactive groups have varying impacts on the adhesion performance.
