Novel Polymeric Composites Through Molecular Engineering.
Abstract
The research projects covered in this grant developed techniques for improving the properties of three classes of high-temperature polymers of particular interest to the US Air Force, specifically some polyamides, polyimides, and polybenzoxazoles and polybenzobisthiazoles. Mechanical properties were of primary interest, and were improved by precipitating ceramic-type fillers such as silica and titania into them in-situ, using sol-gel hydrolysis and condensation reactions. There was also an important bonus in forming hybrid organic-inorganic composites obtained in this way, specifically decreased water absorption. Such suppression of water absorption is important for maintaining mechanical properties such as dimensional stability, and for control of some dielectric properties as well. The improvements obtained were found to be greatest when a bonding agent was used to improve the interfacial bonding between the organic polymer phases and the inorganic ceramic phases. These bonding agents also have the advantage of improving the transparencies of these materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 16, 1996
- Accession Number
- ADA316480
Entities
People
- J. E. Mark
Organizations
- University of Cincinnati