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Synthesis, characterization of novel dihydrazide containing polyurethanes based on N 1 , N 2 ‐bis[(4‐hydroxyphenyl)methylene]ethanedihydrazide and various diisocyanates
Author(s) -
Raghu A. V.,
Jeong Han Mo
Publication year - 2007
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.27447
Subject(s) - isophorone diisocyanate , diol , hexamethylene diisocyanate , polymer chemistry , polyurethane , methylene , crystallinity , materials science , fourier transform infrared spectroscopy , amorphous solid , chemistry , organic chemistry , composite material , physics , quantum mechanics
Four novel types of polyurethanes (PUs) were prepared from N 1 , N 2 ‐bis[(4‐hydroxyphenyl)methylene]ethanedihydrazide with two aromatic diisocyanates (4,4′‐diphenylmethane diisocyanate and tolylene 2,4‐diisocyanate) and two aliphatic diisocyanates (isophorone diisocyanate and hexamethylene diisocyanate). The chemical structure of both diol and PUs was confirmed by UV–vis, fluoroscence, FTIR, 1 H NMR, and 13 C NMR spectral data. DSC data show that PUs have multiple endotherm peak. X‐ray diffraction revealed that the PUs contained semicrystalline and amorphous regions that varied with the nature of the backbone structures. PUs were soluble in polar aprotic solvents. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008