in this research, the effect of nanoclay on physiochemical, thermal and structural properties of urea formaldehyde resin (uf) was investigated. the prepared gluf resin was mixed mechanically with the 0.5, 1 and 1.5% nanoclay for 5 min at room temperature. the physicochemical properties of the prepared resins were measured according to standard methods. also, the thermal and structural changes i...

light weight wood base sandwich panels have some special properties and their most important properties is high mechanical strength with its light weight. these panels can replace instead of traditional structural systems in iran. the purpose of this paper is investigating the mechanical properties of light weight wood base sandwich panels that have made from sunflower stalk wastes and particle...

This study was initiated to determine the wettability of three Honduran bamboo species by contact-angiemeasurements. Static contact angles of urea formaldehyde (UF), phenol formaldehyde (PF), isocyanate (ISO) and distilled water on the bamboo surfaces were measured. The effects of bamboo species, layer (outer, middle and inner) and chemical treatment (hydrochloric acid, sodium hydroxide and dis...

Bending strength, was assessed in glued laminated beams made from local wood species bonded with phenol resorcinol formaldehyde, polyurethane and urea-formaldehyde adhesives. The 3- point loading used as the basis of bending strength assessment along directions parallel perpendicular to glue line. load orientation line offered higher strength. Furthermore, characteristic values obtained were 35...

.~Q).~"('a-.L,t.:.:z. ~ 7, ~,. ~:';, ~,. ~ :';0.:z.1) 7~.8'..Q)_t' C-13 NMR I.: J:? -rff~~, ~"} ~ :,; t.:z. ~ 7~r~ of" v :,;.8'~~ ~ of" v ~ .x.-1" IvM8'~ J: ? -r ~.8'T.o .: t~r~~"('! o~~~~ ~~t'~~~. .:z. ~ Y"t ~"} ~ :,;..~~ of" v ~M~~~.I.:!.o y ?,j-lvl~, ~8L, -r""('8, ~.'8'.Q)~ 'f-v ~.~Q)..y?,j"" t~8L, -rmJJ.T.o': t ~rU~n~. ~~ of"v~.x.-T"".~I.:! .o~.y?,j-lvl~, .:z. ~ 7W.t ~"} ~ ~.II"t'O.9 ppm 8t...

Three types of adhesives, urea-formaldehyde (UF) resin, phenol-formaldehyde (PF) resin, and polymeric methylene bis(phenyl isocyanate) (pMDI), were used for investigating the effect of pressing variables on volatile organic compound (VOC) emissions. The variables examined included press temperature and time, mat moisture content and resin content, and board density. The VOCs emitted during part...

this research was conducted to investigate the effect of acetylation and type of resin on fire resistance of one and three layered populus particleboard. populus particles were acetylated at three levels of acetyl content (wpg of 0, 8.39% and 17.27%). in manufacturing of one and three layered boards with acetylated particles in all thickness or surface of the boards two type of resin, urea form...