✦ LIBER ✦
Preparation of phosphorus-containing polymers—XV. Preparation of phosphorus-containing polyamide-imides from N,N′-bis(4-carboxyphthalimido)-3,3′-diphenylalkylphosphine oxide and aromatic diacetamides
✍ Scribed by M. Sato; M. Yokoyama
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 316 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
Phosphorus-containing polyamide-imides were prepared from N,N'-bis(4-carboxyphthalimido)-3,Y-diphenylalkylphosphine oxide and aromatic diacetamido derivatives by acidolysis; the reaction conditions are discussed. The resulting polymers were fairly soluble in DMA, DMF and conc. H2SO4; the reduced viscosities of polymers in DMA or cone. H2SO4 (0.2g/dl) at 30 ° were 0.19-0.32. The phosphorus-containing polymers have good thermal stability, and are self-extinguished immediately after the flame is removed. Most of the i.r. absorption bands of polymers vanished on heating at above 600 ° .