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Preparation of phosphorus-containing polymers—XVII. Preparation of polyamides containing phenoxaphosphine rings

✍ Scribed by M. Sato; M. Yokoyama

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
268 KB
Volume
15
Category
Article
ISSN
0014-3057

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✦ Synopsis

New phenoxaphosphine-containing polyamides were prepared from 2,8-dichloroformyl-10phenylphenoxaphosphine 10-oxide (I!!) and aromatic diamines in DMA by low-temperature solution polycondensation in the presence of triethylamine as acid acceptor. (III) was synthesized by the chlorination of 2,8-dicarboxy-10-phenylphenoxaphosphine 10-oxide derived from 2,8-dimethyl-10-phenylphenoxaphosphine 10-oxide by pyridine-permanganate oxidation. The resulting polyamides had a reduced viscosity of 0.14--0.40 dl/g in DMA or cone. H2SO4 at 30 °. They were soluble in conc. HzSO,~ and some of them dissolved in DMA, DMF and DMSO, but all were insoluble in benzene and formic acid, etc. They had good thermal stability, hardly degrading until a temperature of about 400 ° was reached; they showed resistance to ignition.

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