High Performance Elastomers.
Abstract
The investigations of processes leading to high performance elastomer systems based on quinoxaline- or imide rings linked by perfluoroalkylether chains, initiated in February 1987 and described in part in three Interim Reports, were completed. In the final portion of the program mono-, dumbbell-, and polymeric quinoxalines linked by perfluoroalkylether chains, either directly to the heterocycle or via a phenyl group, were synthesized and evaluated. Two types of linking groups were studied: -CF2CF2(OCF2CF2)5- ('A' arrangement) and -CF2CF2CF2O(CF2)4O(CF2)4OCF2CF2CF2- ('B' arrangement). The thermal stability of the quinoxalines based on the 'A' linkage was approx. 316 deg C. Materials linked by the 'B' arrangement to the quinoxaline via p-phenylene units gave dumbbell- and polymeric quinoxalines of thermal and thermal oxidative stability exceeding 330 deg C, proving the validity of the approach taken. Investigations of perfluoroalkylether-linked imides were limited; the yields were low and purifications tedious.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1993
- Accession Number
- ADA310655
Entities
People
- K. J. Paciorek