Thermoplastic hybrid materials: Polyhedral oligomeric silsesquioxane (POSS) reagents, linear polymers, and blends
- Phillips Lab., Edwards AFB, CA (United States). Propulsion Directorate
- Ohio State Univ., Columbus, OH (United States). Dept. of Consumer and Textile Sciences
- Hughes STX, Edwards AFB, CA (United States)
Polyhedral Oligomeric SilSesquioxanes (POSS) are structurally well defined cage-like molecules represented by the generic formula (RSiO{sub 1.5}){sub n}. POSS compounds possess a unique hybrid composition with an oxygen to silicon ratio of 1.5, intermediate between that for silica and silicone. An entire monomer catalogue (chemical tree) of hybrid POSS-based reagents suitable for polymerization and grafting reactions has been developed from R{sub 7}Si{sub 7}O{sub 9}(OH){sub 3} and related precursors. POSS reagents containing no more than one or two reactive groups enable the preparation of hybrid materials with desirable physical properties such as thermoplasticity, and elasticity. An overview of the synthesis of POSS monomers and thermoplastic POSS-acrylic polymers is given. The thermal and physical properties for POSS-acrylic monomers, homopolymers, and copolymers, and blends with poly(methylmethacrylate) are described.
- OSTI ID:
- 427676
- Report Number(s):
- CONF-960401--; ISBN 1-55899-338-X
- Country of Publication:
- United States
- Language:
- English
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