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Phosphazene diamines
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kratzer, R. H. Paciorek, K. L. Harris, D. H. Ito, T. I. |
| Copyright Year | 1980 |
| Description | The synthesis of a specific phosphazene diamine was optimized, other phosphorus-containing diamines were prepared, and their effect upon certain characteristics of epoxy resins, prepared via reaction with MY 720, in particular, char yield at elevated temperatures was evaluated. The synthesis of the phosphazene diamine resulting from the interaction of methylenedianline with 4,4'-bis(diphenylphosphino)biphenyl was simplified into a one step process giving 77 percent yield of the pure product. Using this procedure, a related diamine containing bis(diphenylphosphino)methane was obtained in a 70 percent yield. Preparation of another class of phosphorus containing amines based upon p-aminophenyldiphenyl-phosphine was unsuccessful; the inability to produce p-aminophenylithlum was responsible for this failure. Seven epoxy resins employing Araldite MY 720, diaminodiphenylsulfone, and two of the phosphorus containing diamines were prepared, characterized, and their char yield capacity at elevated temperatures assessed. Based on these investigations, the resins containing phosphorus appear to exhibit significantly better char formation characteristics than materials hardened using conventional amines, without impairing the other properties measured. |
| File Size | 13058659 |
| Page Count | 64 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810001661 |
| Archival Resource Key | ark:/13960/t20c9rx0r |
| Language | English |
| Publisher Date | 1980-10-01 |
| Access Restriction | Open |
| Subject Keyword | Nonmetallic Materials System Failures Diamines Epoxy Resins Phosphorus Systems Analysis Synthesis Chemistry Manufacturing High Temperature Graphs Charts Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
