Synthesis and characterization of novel polyurethanes based on 2,6-bis(4-hydroxybenzylidene) cyclohexanone hard segments

Four novel polyurethanes (PUs) containing 2,6‐bis(4‐hydroxybenzylidene) cyclohexanone hard segments with four diisocyanate, namely, 4,4′‐diphenylmethane diisocyanate, toluene 2,4‐diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate, were prepared. Structural elucidation and thermal...

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Bibliographic Details
Published in:Journal of applied polymer science 2007-04, Vol.104 (1), p.81-88
Main Authors: Raghu, A. V., Anita, G., Barigaddi, Y. M., Gadaginamath, G. S., Aminabhavi, T. M.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
fluorescence
FT-IR
NMR
Organic polymers
phase separation
Physicochemistry of polymers
Polymers with particular properties
polyurethanes
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:Four novel polyurethanes (PUs) containing 2,6‐bis(4‐hydroxybenzylidene) cyclohexanone hard segments with four diisocyanate, namely, 4,4′‐diphenylmethane diisocyanate, toluene 2,4‐diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate, were prepared. Structural elucidation and thermal characterization of these PUs were done by Fourier transform infrared, UV, and fluorescence spectroscopy, 1H‐NMR, 13C‐NMR, and differential thermal analysis/thermogravimetric analysis. All of the PUs contained domains of semicrystalline and amorphous structures as indicated by X‐ray diffraction. PUs were soluble in polar aprotic solvents such as N‐methyl‐2‐pyrrolidone, dimethylformamide, and dimethyl sulfoxide. Acoustic properties were calculated from the group contribution method. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
ISSN:0021-8995
1097-4628
DOI:10.1002/app.25518