ABSTRACT
The polysiloxanes are also known as silicones, and are commonly used as elastomers, waxes, lubricants, and coatings [1]. The most common polymer of this type is polydimethylsiloxane (PDMS) {IX-A-I}, in which both Rand R' of Structure A are methyl groups; it is commonly known as silicone rubber or oil. Silicone materials, which are produced in a wide variety of molecular weights, are prepared from chlorosilane (R2SiC}z) monomers. Silicones are chemically inert and stable under high-temperature conditions, so they are often found in demanding applications, such as medical devices, gaskets, and seals. Polysiloxanes designed for use as coatings generally have complex side groups with additional functionalities that improve adhesion to the surface, or that permit cross-linking.
