studying thermal behavior and formaldehyde emission of modified urea formaldehyde resin by furfural

there are adequate sources for wood adhesives, but scarcity of oil resources can affect the cost and future availability of oil based resins. for avoiding of this process, seeking for feasibility of replacement of these oil feedstocks is necessary. in present work, thermal behavior of urea formaldehyde resin modified by furfural was investigated. the thermo-gravimetry was used for this purpose, and ftir spectroscopy also was used to determine the functional groups in adhesives. in this study, three types of resins including industrial urea formaldehyde, and urea formaldehyde furfural in 25% and 50% of formaldehyde replacement by furfural were considered as variables. the formaldehyde emission from manufactured particle-board also was measured. results of thermal studying of adhesives indicated that resin modification had improving influence on thermal properties of resin, especially in higher temperatures (around 220-380˚c). obtained ftir spectrums also revealed the much similarity between groups and bonds of industrial resin and modified resins. modification of resin by furfural reduced the formaldehyde emission of particleboard to e1 level.