Silane coupling agents typically have a general formula of (RO)3SiR', where R is an alkoxy group and R' is an organofunctional group. The alkoxy groups hydrolyze in the presence of moisture to form silanol groups, which can further react with hydroxyl groups on inorganic surfaces like silica or titania. The organofunctional group can react with polymers or other organic compounds, thus forming a covalent bond between the two materials.
