Affiliation:
1. Kostroma State University
Abstract
Reducing the pressing temperature of plywood on the FF binder allows you to reduce its cost, but at the same time, the physical and mechanical characteristics of plywood deteriorate. Modification of the phenol-formaldehyde binder with hydrogen peroxide reduces the curing time of the phenolic binder, the pressing temperature of the FSF plywood, and improves the physical and mechanical properties of the FSF plywood. Regression models have been developed for dependence of the plywood strength during cleavage along the adhesive seam, strength during static bending, and thickness swelling after 24 hours in water on the factors varied in the experiment – the proportion of hydrogen peroxide addition and the pressing temperature. The IR spectra of plywood allow us to estimate the effect of H2O2 on the bonds involved in the structure formation of material. With the addition of hydrogen peroxide, the number of active methylene groups decreases, which indicates an increase in degree curing of modified binder.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference20 articles.
1. Wood boards and plywood today: numbers, facts and development prospects, https://proderevo.net/industries/wooden-plates/drevesnye-plity-i-fanera-segodnya-tsifry-fakty-problemy-i-perspektivy-razvitiya.html
2. Russian plywood industry: to keep up, you need to change, https://lesprominform.ru/jarticles.html?id=3082
3. Improved water resistance of UF adhesives for plywood by small pMDI additions;Mansouri;Holz als Roh- und Werkstoff,2005
4. Fumed silica as a filler for MUPF resin in the process of manufacturing water-resistant plywood;Dukarska;European Journal of Wood and Wood Products,2015
5. Environmentally-Friendly High-Density Polyethylene-Bonded Plywood Panels;Bekhta;Polymers,2019