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Condensation polymers from diisocyanates with dihydrazides and hydrazine
Author(s) -
Campbell Tod W.,
Foldi Veronika S.,
Farago John
Publication year - 1959
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1959.070020504
Subject(s) - hydrazine (antidepressant) , polymer , hydrate , condensation , materials science , polymer chemistry , polymer science , condensation polymer , chemical engineering , organic chemistry , chemistry , composite material , chromatography , thermodynamics , physics , engineering
Diisocyanates condense readily with hydrazine or hydrazine hydrate to give polyureylenes with the structure:\documentclass{article}\pagestyle{empty}\begin{document}$$ \left[ \hbox{---} {\rm R} \hbox{---} {\rm NHCONHNH} \hbox{---} {\rm CONH} \hbox{---} \right]_x $$\end{document} Similarly, dihydrazides (NH 2 NHCOR′CONHNH 2 ) condense with diisocyanates to give polymers with the structure:\documentclass{article}\pagestyle{empty}\begin{document}$$ \left[ \hbox{---} {\rm R} \hbox{---} {\rm NHCONHNH} \hbox{---} {\rm COR'} \hbox{---} {\rm CONHNHCONH} \hbox{---} \right]_x $$\end{document} Tough films and fibers can be prepared from these polymers by conventional techniques. Solutions of some of these polymers are relatively unstable at elevated temperatures, the polymer apparently reverting to starting materials. Attempts to stabilize the solutions were unsuccessful.