INTERACTION BETWEEN AMINES AND POLY(N-PHENYLMALEIMIDES)

The interactions of substituted poly(N-phenylmaleimides) with low- and high-molecular-weight amines were studied. Colourless chloroform solu tions of polymers, which carry electron-attracting substituents in ben zene rings, turn intensively red on addition of amines in neutral or b asic media depending on the nucleophilicity and accessibility of amino groups. Absorption spectra of the solutions in the visible range sugg est that the formation of colour complexes consists in an interaction of free electron pairs of amines with adjacent carbonyl groups of the polyimides.