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HIGH-TEMPERATURE-RESISTANT POLYMER RESEARCH.
Quarterly rept. no. 4, Apr-Jun 68.
NAVAL WEAPONS CENTER CORONA LABS CA
Pagination or Media Count:
The preparation of 180 g of beryllium 4-biphenylphenyl-phosphinate for evaluation purposes has been carried out. Beryllium a-naphthylphenylphosphinate has been prepared and evaluated for thermal stability. An attempt was made to prepare beryllium diphenylphosphinate-methylphenylphosphinate copolymer in trifluoroacetic acid, and an attempt was also made to prepare a cross-linked polymer from beryllium methylphenylphosphinate copolymer in trifluoroacetic acid, and an attempt was also made to prepare a cross-linked polymer from beryllium methylphenylphosphinate into which was incorporated a small quantity of phenylphosphonic acid. A preliminary study of the reactions of basic beryllium acetate with phosphinic acids was undertaken to see if tractable polymer formed. Molecular weight studies of several beryllium phosphinate polymers in toluene have shown that water causes rapid degradation from approximately 200 to 60 polymer units. Author-PL.
APPROVED FOR PUBLIC RELEASE