Accession Number : ADA310655

Title :   High Performance Elastomers.

Descriptive Note : Final rept. 24 Feb 87-30 Sep 93,

Corporate Author : TECHNOLUBE PRODUCTS CO VERNON CA

Personal Author(s) : Paciorek, K. J.

PDF Url : ADA310655

Report Date : OCT 1993

Pagination or Media Count : 179

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.

Descriptors :   *ELASTOMERS, *IMIDES, *QUINOXALINES, MATERIALS, POLYMERS, THERMAL STABILITY, OXIDATION, ETHERS, RINGS, LINKAGES, PHENYL RADICALS, FLUORINATED HYDROCARBONS, ALKYL RADICALS, FLUORINE COMPOUNDS.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Elastomers and Rubber
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE