《【道康宁】硅烷偶联剂产品【英文】》.pdfVIP

A Guide to Silane Solutions Silane Coupling Agents The Concept of Coupling with Organofunctional Silanes Silane Coupling Agents ilane coupling agents are silicon-based chemicals that contain two types of reactivity – inorganic and organic – in the same molecule. A typical general structure is (RO) SiCH CH CH -X, 3 2 2 2 where RO is a hydrolyzable group, such as methoxy, ethoxy, or acetoxy, and X is an organofunctional group, such as amino, methacryloxy, epoxy, etc. A silane coupling agent will act at an interface between an inorganic substrate (such as glass, metal or mineral) and an organic material (such as an organic polymer, coating or adhesive) to bond, or couple, the two dissimilar materials. A simplified picture of the coupling mechanism is shown in Figure 1. Figure 1. The silane coupling mechanism. Inorganic Organic Fiberglass Si Rubber Fillers Polymers Metals Plastics Figure 2. SEM of silica-filled epoxy resin. Without Silane With Silane Why Silane Coupling during composite aging and use. • Smoother surfaces of Agents Are Used The coupling agent provides a composites stable bond between two otherwise • Less catalyst inhibition of When organic polymers are re- poorly bonding surfaces. Figure 2 thermoset composites inforced with glass fibers or miner- shows (via an SEM of the fracture