Effects of Synthesized Condition of Urea-Formaldehyde Resin on theInitial Formaldehyde Emission Properties of Plywood
نویسندگان
چکیده
منابع مشابه
modification of urea- formaldehyde resin with furfural in particleboard for reduction of formaldehyde emission
partial replacement of formaldehyde with furfural in the urea-formaldehyde resin on the formaldehydeemission, physical and mechanical properties of particleboard was investigated. the modulus ofrupture (mor), modulus of elasticity (moe), internal bond (ib), water absorption (wa), thicknessswelling (ts) and formaldehyde emission (fe) of poplar particleboards made with the modifiedresins were mea...
متن کاملstudying 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,...
متن کاملStructure formation in urea-formaldehyde resin synthesis
The structure formation in acid promoted polycondensation and particularly in alkaline post-treatment with urea was studied by 13C NMR spectroscopy in the three-step synthesis of ureaformaldehyde resins. Trishydroxymethyl urea was identified as the constituent of the mixture of hydroxylmethylated urea derivatives obtained in alkaline conditions. The formation of methylenes linked to secondary o...
متن کاملThe effects of adding the aluminum sulfate to the urea formaldehyde adhesive applied on plywood
1 Department of Furniture and Decoration Education, Dumlupinar University, 43500 Simav-Kutahya, Turkey. 2 Department of Furniture and Decoration, Giresun University, Giresun Vocational School, 28048, Giresun-Turkey. 3 Department of Furniture and Decoration, Artvin Coruh University, Artvin Vocational School, 08000, Artvin-Turkey. 4 Department of Forest Industrial Engineering, Artvin Coruh Univer...
متن کاملMelamine-Bridged Alkyl Resorcinol Modified Urea– Formaldehyde Resin for Bonding Hardwood Plywood
A powdery product was obtained by the reaction of methylolated melamine with alkyl resorcinols to form melamine-bridged alkyl resorcinols (MARs). The effects of the addition of this powder on the bonding strength and formaldehyde emission of urea–formaldehyde (UF) resins were investigated. Three types of UF resins with a formaldehyde/urea molar ratio of 1.3 synthesized by condensation at pH 1.0...
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ژورنال
عنوان ژورنال: Journal of The Adhesion Society of Japan
سال: 2000
ISSN: 0916-4812,2187-4816
DOI: 10.11618/adhesion.36.265