Silicon-Containing Polymers and Composites
AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE SPACE AND MISSILE PROPULSION DIV/PROPULSION MATERIALS APPLICATIONS BRANCH
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There are many examples of improved oxidation-resistance in organic polymeric materials achieved through the incorporation of silicon-containing compounds. These compounds are often organically-modified particles, such as silicas, silicates, clays, or polyhedral oligomeric silsesquioxanes, which can be mechanically blended into a wide variety of polymer matrices. However, in order to achieve improved dispersion of the silicon phase, it is often desirable for the silicon-containing compound to be covalently bound to the polymer backbone. This can be accomplished by polymerization of silicon-containing monomers, copolymerization of silicon monomers with desired organic monomers, or chemical modification of organic polymers by reactive silicon-containing molecules. In thermoplastic polymers, examples of both blended and covalent incorporation are common. In thermosets, however, the covalent approach is typically desired due to the ease of monomer processing and the low potential for phase separation during cure. A variety of silicon-containing fillers monomers, polymers, and composites will be discussed, as well as the advantages of each.
- Inorganic Chemistry
- Polymer Chemistry
- Laminates and Composite Materials