PHOSPHONITRILIC POLYMERS STABLE AT HIGH TEMPERATURES.
Abstract
The objective of the investigation was the development of new thermoplastic and thermosetting resins from phosphonitrilic chloride trimer for high temperature electrical applications. The preparation of the tetraphenoxydichlorophosphonitrile trimer (I) was scaled up to yield a total of thirty pounds of this monomer. A soluble P-O-P linked polymer of I was obtained and found to be stable to 317C. The P-O-P linked polymer in which the theoretical repeating unit is -P3N3(OC6H5)4O- appears slightly more stable than the polymer with the theoretical repeating unit -P3N3(C6H5)2(OC6H5)2O-. Monomer I was reacted with several aromatic diols and the resulting polymers examined by thermogravimetric analysis. Polar solvents accelerate the reaction of P3N3Cl6 and hydroquinone at 80C. A soluble polymer of MW>6000 was prepared from P3N3(OC6H5)4Cl2 and disodiobisphenol A. Fire-retardant (self-extinguishing) glass cloth laminates were prepared from both P-O-P and bisphenol A- linked polymers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- AD0628079
Entities
People
- Aspet Merijanian
- Douglas I. Relyea
- Gerald J. Klender