polyhydrazide

https://doi.org/10.1351/goldbook.15283
Polymer composed of macromolecules containing hydrazide linkages in the backbone: \[\ce{-CO-NR^1\bond{-}NR^2\bond{-}CO\bond{-}}\] where \(\ce{R^1}\) and \(\ce{R^2}\) are each hydrogen, alkyl, aryl, or heteroaryl.
Example:
polyhydrazide
Source:
PAC, 2009, 81, 1131. (Glossary of class names of polymers based on chemical structure and molecular architecture (IUPAC Recommendations 2009)) on page 1157 [Terms] [Paper]