Preparation of phosphorus-containing polymers-xxi: Synthesis of phosphorus-containing polymaleimide-amines

✍ Scribed by H. Kondo; M. Sato; M. Yokoyama

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 333 KB
• Volume: 16
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(80)90138-x

✦ Synopsis

The reaction of dichloromaleimides with aromatic amines was applied to the preparation of phosphorus-containing polymers, so-called polymaleimide-amines. The phosphorus-containing polymaleimide-amines were synthesized from N,N'-bisdichloromaleimido-3,3'-diphenylalkylphosphine oxides and aromatic diamines or piperazine. Some properties of the resulting polymers, such as solubility and thermal behaviour, were investigated. Most of the polymers were obtained at yields of 80°o or above. The reduced viscosities of the polymers, measured at a concentration of 0.2 g/dl in DMA at 30, were 0.13-0.27 dl/g. Some of the polymers, especially those prepared from piperazine, were freely soluble in DMF, DMA, DMSO, conc HzSO4, formic acid etc., but all the polymers seemed to decompose in cone H2SO4 or formic acid. The phosphorus-containing polymaleimide-amines had poor thermal stability and little flame retardance.