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Erschienen in:
1984 | OriginalPaper | Buchkapitel
Polymer Complex Formation of Polyamic Acids with Amines
verfasst von : L. Minnema, J. M. van der Zande
Erschienen in: Polyimides
Verlag: Springer US
Enthalten in: Professional Book Archive
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Upon the addition of amines or ammonia, to solutions of different polyamic acids (PAA) it was noticed that sometimes precipitates were formed. This is particularly the case with the PAA based on the condensation of pyromellitic acid dianhydride with 4,4 -diaminodiphenylether, (PAA(I)), and with primary amines or ammonia. It is assumed that the addition of amines to polyamic acids causes the polymer to complex with itself; normally polymer complexation involves two different polymers.