Abstract
AbstractThe reaction of hydrazine hydrate with aromatic anhydrides may give either N‐amino imides or cyclohydrazides. The conditions that favor the formation of N‐aminoimides, in which the imide contains respectively a 5‐ and 6‐membered ring, are discussed. These compounds may be reacted with aromatic anhydrides to give N‐N‐linked imides. The properties of a number of model compounds and polymers are described, and it is shown that those compounds which have alternating 5‐ and 6‐membered imide rings give the maximum oxidative stability in air at 400°C.
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