- Author
- Ramirez, M. L. | Walters, R. | Savitski, E. P. | Lyon, R. E.
- Title
- Thermal Decomposition of Cyanate Ester Resins.
- Coporate
- Hewlett Packard, Aguadilla, PR Eastman Chemical Co., Kingsport, TN Galaxy Scientific Corp., Egg Harbor Township, NJ Federal Aviation Administration, Atlantic City International Airport, NJ
- Sponsor
- Federal Aviation Administration, Washington, DC
- Report
- DOT/FAA/AR-01/32; AIR-100, September 2001, 20 p.
- Distribution
- AVAILABLE FROM: Federal Aviation Administration William J. Hughes Technical Center's Fire Safety Section's Full-Text technical reports page (in Adobe Acrobat portable document format [PDF]): http//www.fire.tc.faa.gov/reports/report.stm AVAILABLE FROM National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161. Telephone: 1-800-553-6847 or 703-605-6000; Fax: 703-605-6900; Rush Service (Telephone Orders Only) 800-553-6847; Website: http://www.ntis.gov
- Keywords
- resins | thermal decomposition | thermal decomposition | flammability | thermal analysis | infrared spectroscopy | pyrolysis | gas chromatography | mass spectrometry
- Identifiers
- polycyanurate; cyanate ester; thermoset polymer
- Abstract
- Polycyanurate networks were prepared by thermal polymerization of cyanate ester monomers containing two or more cyanate ester functional groups. The thermal decomposition chemistry of nine different polycyanurates was studied by thermogravimetry and infrared analysis of solid films and analysis of thegases evolved during pyrolysis using infrared spectroscopy and gas chromatography-mass spectrometry. It was found that the thermal stability of the polycyanurates was essentially independent of monomer chemical structure with the major mass loss occuring at about 450 deg C for all materials. Analysis of the solid-state and gas phase thermal degradation chemistry indicates a thermal decomposition mechanism for polycyanurates which begins with hydrocarbon chain scission and cross-linking at temperatures between 400 deg-450 deg C with negligible mass loss, followed by decyclization of the triazine ring at 450 deg C that liberates volatile cyanate-ester decomposition products. The solid residue after pyrolysis increases with the aromatic content of the polymer and incorporates about two thirds of the nitrgen and oxygen present in the original material.