DEVELOPMENT OF IMPROVED POLYPHENYLENE CURE PROCESSES
Abstract
The object of this program was to obtain crosslinked polyphenylene resins through the identification of chemical curing agents and the development of curing processes. Improved resinous matrices of this type were expected to have improved ablative performance characteristics, mechanical properties, and processability. Nitration, carboxylation, and sulfonation of polyphenylene polymers were accomplished in an effort to introduce reactive sites on the polymer for subsequent copolymerization or polymerization. Only the latter process yielded a useful product. Suitable cures were obtained with a trifunctional sulfonyl chloride and a disulfonic acid. A polyphenylene thermosetting resin was prepared by dissolving the aromatic sulfonyl chloride in chloroform lacquers of polyphenylene. The resin was then applied to carbon and high silica fabric, dried to a tacky state, plies cut and stacked in a mold, and then transformed into a hard composite by the application of heat and pressure. Ablative characteristics of the composite were determined, and benzene trisulfonylchloride cured polyphenylene was superior to the state-of-the-art phenol formaldehyde resins.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1967
- Accession Number
- AD0813617
Entities
People
- Leroy J. Miller
- Norman Bilow
- Richard I. Akawie
Organizations
- Hughes Aircraft Company