| 초록 |
This study investigated the process of hydrolytic degradation of urea-formaldehyde (UF) resins that have been responsible for the formaldehyde emission (FE) from UF resin-bonded wood panels, using confocal laser scanning microscopy (CLSM). UF resins with two different formaldehyde/urea mole ratios (i.e., 1.6 and 1.0) were cured by adding hardener at two levels (0.1% and 3%), and then were hydrolyzed by exposing them to dilute acid etching at different periods of time. We also measured mass loss of the cured UF resins to obtain supporting the results of CLSM. Factors affecting the hydrolytic degradation of cured UF resins will be discussed on the basis of the CLSM results and mass loss measurements. |
