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NMR structural elucidation of amino resins
Author(s) -
Angelatos A. S.,
Burgar M. I.,
Dunlop N.,
Separovic F.
Publication year - 2004
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.13538
Subject(s) - melamine , urea formaldehyde , formaldehyde , urea , proton nmr , polymer chemistry , condensation , melamine resin , organic chemistry , chemistry , materials science , nuclear magnetic resonance spectroscopy , carbon 13 nmr , condensation polymer , condensation reaction , catalysis , adhesive , physics , layer (electronics) , thermodynamics , coating
Urea formaldehyde, melamine formaldehyde, and melamine urea formaldehyde (MUF) are important industrial amino resins that find application in numerous diverse areas, most notably in the bonding of wood products. To understand the physical properties of these amino resins and, hence, optimize their performance, a knowledge of their chemical structure is necessary. This article reports the use of NMR spectroscopy to acquire this information in the solid and liquid states. 13 C‐NMR experiments, supported and augmented by 1 H‐NMR and 15 N‐NMR results, showed that the two stages of resin synthesis, methylolation followed by condensation, occurred in each type of resin. However, in the various MUF samples analyzed, the second step appeared to be predominantly the self‐condensation of melamine and urea rather than the cocondensation of melamine and urea. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 3504–3512, 2004