Oligomer distribution at the gel point of tannin-resorcinol-formaldehyde cold-set wood adhesives
Date
2012
Authors
Pizzi A.
Pasch H.
Celzard A.
Szczurek A.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Tannin-resorcinol-formaldehyde cold-set adhesives for wood laminating and fingerjointing were examined by Matrix Assisted Laser Desorption/Ionisation Time of Flight (MALDI-TOF) mass spectrometry. The analysis revealed that the adhesive was composed at the gel point of resorcinol-formaldehyde oligomers, unreacted flavonoids, and resorcinol-formaldehyde oligomers coreacted with flavonoid units of the tannin. The last ones constitute a high proportion of the adhesive resin. Furthermore, their proportion is highest at the minimum phenolic reactivity around pH 4. © 2012 Copyright Taylor and Francis Group, LLC.
Description
Article
Keywords
Cold-set adhesives, Coreaction products distribution, Fingerjointing adhesives, Gel point, Glulam adhesives, Tannin-resorcinol-formaldehyde, Wood adhesives
Citation
Journal of Adhesion Science and Technology
26
03-Jan
79
88
26
03-Jan
79
88