ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
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 (NH2NH—COR′CONHNH2) 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.
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1959.070020504
