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Kinetics study on the formation of resol with high content of hydroxymethyl group
Author(s) -
Gao Pin,
Zhang Yanfang,
Huang Guangsu,
Zheng Jing,
Chen Mengmeng,
Cao Xulong,
Liu Kun,
Zhu Yangwen
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.27500
Subject(s) - hydroxymethyl , kinetics , formaldehyde , titration , condensation reaction , phenol , reaction rate constant , polymer chemistry , chromatography , chemistry , chemical engineering , materials science , organic chemistry , catalysis , physics , quantum mechanics , engineering
The application of resol as a crosslinking agent with polyacrylamide has become widespread, but it is not clear for forming mechanisms of extraordinarily high activity of the resol. In this research, the major components of the resol and their mass percentage are investigated by Liquid chromatography‐mass spectrograph, the mechanism of forming the components is exploited. The evolution of formaldehyde, phenol, and first formed addition products were quantitatively traced by titration and high‐performance liquid chromatography, furthermore the kinetics of synthesis is studied based on the analyzing results. The results show that the resol is composed of nine compounds and the sum of percentage for each integral area is more than 99%. In addition, the constant of overall reaction rate k consists of three values of 5.667 × 10 −5 , 7.236 × 10 −5 , and 23.05 × 10 −5 s −1 , which means that the reaction can be separated to three stages of hydroxymethylphenol (HMP) producing stage, dihydroxymethylphenol (DHMP) and trihydroxymethylphenol (THMP) producing stage and condensation stage. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008