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NMR study of the phenol-formaldehyde-water-methanol system

Z. Fiala and M. Navr√°til

Research Institute of Macromolecular Chemistry, 656 49 Brno

 

Abstract: A quantitative evaluation of the system phenol—formaldehyde—water—methanol was carried out by the method of 1H-n.m.r. spectroscopy. The interested region of the molar ratios phenol—formaldehyde—methanol varied within the range 1:29:9.6—1:0.2:0.07 and the spectra obtained were com- pared with the spectrum of water—methanol solution of formaldehyde. The system showed two groups of lines. Four simple singlets of linear polymers of the type C6H5O(CH2O)nH appeared in the region 5.20—5.35 δ whereas in the region 4.7—5.4 δ as many as eleven signals of the polymers HO(CH2O)nH,and CH3O(CH2O)nH could be detected. Another three signals of polymers of the type C6H5O(CH2O)nCH3 appeared in the region 4.8—5.0 δ from the molar ratio phenol—formaldehyde 1:2.2.

Full paper in Portable Document Format: 321a51.pdf

 

Chemical Papers 32 (1) 51–58 (1978)

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