DOI: 10.2298/bg20120719popovic
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Curing of urea-formaldehyde adhesive for particleboards in the presence of some domestic wood species

Abstract: In this doctorate dissertation, the influence of beech, fir and poplar wood species on curing kinetics of commercial urea-formaldehyde (UF) adhesive was investigated. With this objective, the following thermal analysis methods were utilized: differential scanning calorimetry (DSC), dielectric analysis (DEA) and dynamical mechanical analysis (DMA). DSC measurements were obtained in dynamical scanning regime with the heating rates (β) of 5; 10; 15 i 20 o C/min. Test samples consisted of pure UF adhesive, UF adhe… Show more

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Cited by 1 publication
(2 citation statements)
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“…FA emitted from UF resins can come from several sources: (a) unreacted FA resin; (b) FA which is released when the ether bonds are converted to methylene bonds; and (c) FA which is released due to hydrolytic degradation of weak bonds in the crosslinked resin. All these factors form the sources and generative processes for long‐term FA emission 15 . Decreasing the content of FA in the formulation of such resins decreases the amount of terminal CH 2 OH groups, which are surely more reactive than the methylene ones.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…FA emitted from UF resins can come from several sources: (a) unreacted FA resin; (b) FA which is released when the ether bonds are converted to methylene bonds; and (c) FA which is released due to hydrolytic degradation of weak bonds in the crosslinked resin. All these factors form the sources and generative processes for long‐term FA emission 15 . Decreasing the content of FA in the formulation of such resins decreases the amount of terminal CH 2 OH groups, which are surely more reactive than the methylene ones.…”
Section: Resultsmentioning
confidence: 99%
“…All these factors form the sources and generative processes for longterm FA emission. 15 Decreasing the content of FA in the formulation of such resins decreases the amount of terminal CH 2 OH groups, which are surely more reactive than the methylene ones. However, a lower F/U molar ratio allows producing a crystalline framework, which reasonably hinders the penetration of water in the bulk of the material, thus making the reactive moieties less available for hydrolysis.…”
Section: Resultsmentioning
confidence: 99%