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Open cell fire-resistant foamCandidate polyphosphazene polymers were investigated to develop a fire-resistant, thermally stable and flexible open cell foam. The copolymers were prepared in several mole ratios of the substituent side chains and a (nominal) 40:60 derivative was selected for formulation studies. Synthesis of the polymers involved solution by polymerization of hexachlorophosphazene to soluble high molecular weight poly(dichlorophosphazene), followed by derivatization of the resultant polymer in a normal fashion to give polymers in high yield and high molecular weight. Small amounts of a cure site were incorporated into the polymer for vulcanization purposes. The poly(aryloxyphosphazenes) exhibited good thermal stability and the first polymer mentioned above exhibited the best thermal behavior of all the candidate polymers studied.
Document ID
19760020336
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Thompson, J. E.
(Horizons, Inc. Cleveland, OH, United States)
Wittman, J. W.
(Horizons, Inc. Cleveland, OH, United States)
Reynard, K. A.
(Horizons, Inc. Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
April 1, 1976
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA-CR-147791
Accession Number
76N27424
Funding Number(s)
CONTRACT_GRANT: NAS9-14717
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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