SYNTHESIS AND CHARACTERIZATION OF N,N'-ETHANEDIANILINEBISISOMALEIMIDEAND ITS POLYMALEAMIDES WITH SOME ALIPHATIC DIAMINES

New polymaleamides have been synthesized by ring-opening polyaddition of N,N'-ethanedianilinebisisomaleimide (EBIMI) to the aliphatic diamin es, 1,2-diaminoethane, 1,4-diaminobutane, 1,6-diaminohexane, 1,8-diami nooctane, piperazine, 2,5-dimethylpiperazine and 4,4'-diaminodicyclohe xyl-methane in 1-methyl-2-pyrrolidinone and were found to have an inhe rent viscosity in the range 0.09-0.43 g/dl. The appropriate model comp ound was also prepared. The identities of EBIMI, the model compound an d the polymaleamides were confirmed by their IR, UV and H-1-NMR spectr a. The thermal degradation behavior of the polymaleamides is discussed . (C) 1997 Elsevier Science Ltd.