Synthesis of Nitrile Oxide Curing Agents for Perfluoralkyl s-Triazine Elastomers.
Abstract
An improved crosslinking system using a highly purified terephthalonitrile oxide as curing agent for nitrile pendant perfluoroalkyl s-triazine elastomers has been synthesized which allows the preparation of unscorched, uniform composition vulcanizates for use as high temperature, fluid resistant seals and sealants for advanced aircraft systems. The synthesis of the nitrile oxide, the elastomer formulations, and physical properties of the vulcanizates are presented. The isolation of pure terephthalonitrile oxide has been achieved by the use of pure synthetic intermediates and the careful synthesis and handling of the sensitive nitrile oxide. The triazines cured with this material evidence little or no scorching. In addition, the unfilled elastomer specimens had tensile strengths of 700-1100 psi and showed less than 5% weight loss after 1700 hours at 500F in air. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1973
- Accession Number
- AD0913265
Entities
People
- Ronald W. Larochelle
Organizations
- Air Force Research Laboratory