Abstract
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(α-aminoaryl)amido-succinamic acids. Cyclodehydrations of polysuccinamic acids were carried out in DMF in the presence of Ac 2O 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.
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