Effect of Fumed Silica Surface Area on Silicone Rubber Reinforcement

摘要

Fumed silica is a major component of silicone rubber (high consistency rubber;HCR) products.It is by far the most active reinforcing agent for this polymer owing to its unique ability to enhance its physical properties.Chemically,fumed silica is an amorphous material.It consists of high purity silicon dioxide (SiO2) tetrahedrally bound into an imperfect three-dimention-al structure in which only short-range order exists.On its surface there are siloxane groups and a certain concentration of sila-nol groups,which can be classified as isolated,vicinal or geminal.