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Flame Retardant Epoxy ResinsAs part of a program to develop fire resistant exterior composite structures for future subsonic commercial aircraft, flame retardant epoxy resins are under investigation. Epoxies and their curing agents (aromatic diamines) containing phosphorus were synthesized and used to prepare epoxy formulations. Phosphorus was incorporated within the backbone of the epoxy resin and not used as an additive. The resulting cured epoxies were characterized by thermogravimetric analysis, propane torch test, elemental analysis and microscale combustion calorimetry. Several formulations showed excellent flame retardation with phosphorous contents as low as 1.5% by weight. The fracture toughness of plaques of several cured formulations was determined on single-edge notched bend specimens. The chemistry and properties of these new epoxy formulations are discussed.
Document ID
20040073457
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Thompson, C. M. (NASA Langley Research Center Hampton, VA, United States)
Smith, J. G., Jr. (NASA Langley Research Center Hampton, VA, United States)
Connell, J. W. (NASA Langley Research Center Hampton, VA, United States)
Hergenrother, P. M. (NASA Langley Research Center Hampton, VA, United States)
Lyon, R. E. (Federal Aviation Administration Atlantic City, NJ, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2004
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: SAMPE 2004 Symposium and Exhibition
Location: Long Beach, CA
Country: United States
Start Date: May 16, 2004
End Date: May 20, 2004
Sponsors: Society for the Advancement of Materials and Process Engineering
Funding Number(s)
OTHER: 23-755-06-00
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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