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1,2-bis(3-carboxyacryloyl)hydrazine—IV. Transmidation and addition reactions of 1,2-bis(3-carboxyacryloyl)hydrazine with aromatic diamines

✍ Scribed by G.M. Gherasim; I. Zugrävescu

Publisher: Elsevier Science
Year: 1982
Tongue: English
Weight: 356 KB
Volume: 18
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(82)90034-9

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✦ Synopsis

A new method for the synthesis of aromatic poly(amino-maleimides) via polytransamidation followed by polyaddition and ring closure of 1,2-bis(3-carboxyacryloyl)hydrazine (BCAH) with aromatic diamines was found, using the processes between BCAH and anilines. Poly(aminomaleimides) were prepared either in situ or by the separation of poly(ct-aminoaryl)amido-succinamic acids. Cyclodehydrations of polysuccinamic acids were carried out in DMF in the presence of AczO or PPA; in m. cresol as solvent, mixtures of polysuccinamic acids and polymaleimides were obtained. The resulting thermostable polymers were characterized by elemental, spectral and thermal analyses, viscosities and solubilities. They gave transparent brittle films. * DMSO~imethylsulphoxide, DMF~imethylformamide, AcOH--glacial acetic acid, PPA--polyphosphoric acid, Ac20--acetic anhydride.

t In DMF at 20 °, conc. 0.5%. * Calc. for C2tH22N406(Vla): C, 59.15; H, 5.20; N,

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