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- W2149284428 abstract "A total of 13 of the 16 possible methylol derivatives of 2,4′- and 4,4′-dihydroxydiphenylmethane have been synthesized, isolated, and identified. These compounds are found as intermediates in the cure process of resol phenol–formaldehyde (PF) resins. Analysis of the 13C NMR spectra (in acetone-d6) of these compounds provided a way to evaluate the seven methylolphenol ring types (methylol derivatives of 2-hydroxyphenyl and 4-hydroxyphenyl rings) found in typical resol PF resins using the ipso carbon region from 150 to 160 ppm. A simple diagnostic test was developed using the chemical shift values of the methylol methylene carbon atoms to identify the presence of intermediates containing either a 2-hydroxyphenyl or a 4-hydroxyphenyl ring. Using these data it is now possible to analyze the major components in extracted prepreg PF resins. Copyright © 2002 John Wiley & Sons, Ltd." @default.
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- W2149284428 date "2002-01-01" @default.
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- W2149284428 title "A13C NMR study of the methylol derivatives of 2,4?- and 4,4?-dihydroxydiphenylmethanes found in resol phenol-formaldehyde resins" @default.
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- W2149284428 doi "https://doi.org/10.1002/mrc.1089" @default.
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