Effect of curing conditions on the water vapor sorption behavior of melamine formaldehyde resin and resin-modified wood

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-09-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
14
11253-11266
Series
Journal of Materials Science, Volume 55, issue 25
Abstract
Impregnation modification of wood with melamine formaldehyde resin reduces the adverse effects caused by moisture uptake, but the underlying modes of action are not fully understood. The present study showed that it is crucial to understand the sorption behavior of the pure resin when interpreting the behavior of resin-modified wood. Furthermore, the applied heat-curing conditions had a significant effect on the moisture uptake of resin-modified wood. At the same resin loads, dry curing conditions were more effective in causing a cell wall bulking effect than wet curing conditions. This reduced the water-accessible cell wall pore volume in dry cured wood and counterbalanced the moisture uptake by the resin. Deuterium exchange measurements suggested that the occupancy of cell wall pores reduced the number of simultaneously active sorption sites. However, there was no evidence that a swelling restraint or reduced mechanical relaxation affected the water sorption of resin-modified wood significantly.
Description
Keywords
Other note
Citation
Altgen, M, Altgen, D, Klüppel, A & Rautkari, L 2020, ' Effect of curing conditions on the water vapor sorption behavior of melamine formaldehyde resin and resin-modified wood ', Journal of Materials Science, vol. 55, no. 25, pp. 11253-11266 . https://doi.org/10.1007/s10853-020-04814-0