Polymer Nanocomposites Designed with Polyhedral Oligomeric Silsesquioxanes (POSS) and Plastics
Abstract
Polyhedral oligomeric silsesquioxanes (POSS) are nanoparticles that are used to enhance the thermal and mechanical properties of polymeric systems and are being examined for use in many applications. These applications include space-survivable coatings and fire-resistant materials. Due to their physical size, POSS incorporation in polymers generally serves to reduce chain mobility, thus affecting both thermal and mechanical properties. Polymeric materials are typically tough, lightweight, and easy to process. However, they often lack resistance to oxidation and degrade at high temperatures. Ceramic materials, on the other hand, are thermally stable and have high oxidative resistance, but are brittle and difficult to process. POSS materials contain a thermally robust inorganic core that is surrounded by an organic corona (figure 1), which increases miscibility with a polymer. Because of a wide range of available organic functionalities, POSS have been incorporated into many polymer systems and found to improve the polymer thermo-oxidative stability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 22, 2005
- Accession Number
- ADA450149
Entities
People
- Joseph M Mabry
- Timothy Haddad
Organizations
- Air Force Research Laboratory