ISSN:
1572-8870
Keywords:
Cyclophosphazenes
;
polyurethanes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The object of this work was to prepare organic inorganic oligomers or polymers from diisocyanates and hydroxylated cyclotriphosphazenes. The reaction of a dihydroxylated cyclotriphosphazene. (3.5-dihydroxyphenoxy)(pentaphenoxy) cyclotriphosphazene.3. obtained by the reaction of (3.5-dimethoxyphenoxy) (pentaphenoxy)cyclotriphosphazene with BBr3 H2O and two diisocyanates, toluen 2.4 (TDI)- and hexamethylene 1.6 (HDI)-diisocyanates, leads to the new cyclotriphosphazene-substituted polyurethanes,4 and5. The structures of both classes of compounds were investigated by31P.13C. and1H NMR. infrared spectroscopy, mass spectrometry, and elemental analysis. The molecular weights of polymers were determined by SEC analysis. The thermal behavior of the new polyurethanes was investigated. The thermogravimetric analysis indicates that incorporation of cyclotriphosphazene moiety as a pendant group leads to increased thermal stability.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01098322
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