Silane coupling agents play an important role in the preparation of composites from organic polymers and inorganic fillers such as glass, minerals, and metals. The general structure of silane coupling agents are (RO)3-Si-R‘-X, where X is an organofunctional group, R‘ is a small alkylene linkage, and RO is a hydrolyzable group such as an alkoxy group. The organofunctional group and the alkoxy group can form strong bonds with the polymer matrix and with the filler particles, respectively. The number of hydroxy groups resulting from the hydrolysis of alkoxy groups can be controlled by adjusting the rates of hydrolysis and condensation of the silane coupling agent to achieve optimal bonding effects[1].
[1] Kumudinie, C. “Polymer–Ceramic Nanocomposites: Interfacial Bonding Agents.”Encyclopedia of Materials: Science and Technology, 2001:7574-7577.
