Phenol–formaldehyde wood adhesive characterization by proton magnetic resonance spectroscopy
Article first published online: 9 MAR 2003
Copyright © 1975 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 19, Issue 1, pages 215–225, January 1975
How to Cite
Steiner, P. R. (1975), Phenol–formaldehyde wood adhesive characterization by proton magnetic resonance spectroscopy. J. Appl. Polym. Sci., 19: 215–225. doi: 10.1002/app.1975.070190116
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 1 JUL 1974
- Manuscript Received: 20 MAY 1974
Acetylation of phenol–formaldehyde (PF) wood adhesives afforded derivatives which could be characterized by proton magnetic resonance (PMR) spectroscopy. Through use of the chemical shift and integral parameters, relative comparisons were made for the degree of polymerization of resins prepared with different molar ratios. Additionally, PMR studies of these acetylated derivatives provided a means of determining methylol content and number of aromatic protons remaining, and to some extent gave an estimate of molar formaldehyde-to-phenol ratio. Experiments conducted with Ca(OH)2 and NaOH as catalysts showed the latter to be the more effective catalyst for PF systems.