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142 results found
During weathering, wood-plastic composites (WPCs) can fade and lose stiffness and strength. Weathering variables that induce these changes include exposure to UV light and water. Each variable degrades WPCs independently, but can also act synergistically. Recent efforts have highlighted the need to…
Author(s): Nicole M. Stark
Keywords: Elasticity, flexure, stabilizing agents, ultraviolet radiation, composite materials, mechanical properties, weathering, deterioration, color fading, wood-plastic composites, modulus of elasticity, photostabilization, surface properties, discoloration, photodegradation
Source: Proceedings : 3rd Wood Fibre Polymer Composites International Symposium : Innovative Sustainable Materials Applied to Building and Furniture : March 26-27, 2007 ... Bordeaux, France. [S.l. : s.n.], 2007: 10 pages.
Year: 2007
Wood can be chemically modified to reduce the moisture content of the cell wall and increases decay resistance. As the level of bonded chemical increases, the cell wall equilibrium moisture content decreases and the resistance to attack by white-and brown-rot fungi increases. There is a direct…
Author(s): Roger M. Rowell
Keywords: Plant cell walls, wood-decaying fungi, wood moisture, wood chemistry, chemical reactions, biodegradation, wood preservation, deterioration, acetylation, resistance to decay, modified wood, preservation, moisture content, chemical modification of wood, dimensional stability
Source: ECOWOOD 2006 : 2nd International Conference on Environmentally-Compatible Forest Products, Fernando, Pessoa University, Oporto, Portugal, 20-22 September 2006. [S.l. : s.n.], 2006: p. 227-237.
Year: 2006
Wood was designed after millions of years of evolution, to perform in a wet environment, and nature is programmed to recycle it, in a timely way, back to the basic building blocks of carbon dioxide and water through biological, thermal, aqueous, photochemical, chemical, and mechanical degredations…
Author(s): Roger M. Rowell
Keywords: Acetylation, wood chemistry, wood moisture, deterioration, acetic acid, modified wood, acetic anhydride, acetylated wood, chemical modification of wood
Source: Forest products journal. Vol. 56, no. 9 (Sept. 2006): pages 4-12.
Year: 2006
For most markets for wood, it is used without any treatments or modifications. When wood is used in adverse environments, it may be treated with chemicals to help prevent decay, improve water resistance, reduce the effects of ultraviolet radiation or increase fire retardancy. Many of these…
Author(s): Roger M. Rowell
Keywords: Acetic anhydride, acetylation, chemical modification, decay, dimensional stability, equilibrium moisture content, fungal cellar, fungi, plant cell walls, wood-decaying fungi, wood moisture, wood chemistry, biodegradation, deterioration, chemical reactions, wood preservation, acetylated wood, resistance to decay, modified wood, chemical modification of wood, moisture content, preservation
Source: Wood material science and engineering. Vol. 1 (2006): pages 29-33.
Year: 2006
This poster presentation reports on recent laboratory work aimed at quantifying the biodegradation process of wood during exposure to natural weathering. Approximately 330 southern pine lumber specimens were placed “above-ground” at an outdoor exposure site near Gulfport, Mississippi for periods up…
Author(s): Xiping Wang, James P. Wacker
Keywords: Wood preservatives, multivariate analysis, near infrared spectroscopy, nondestructive testing, spectrum analysis, deterioration, weathering, preservatives, DDAC, Didecyl-dimethyl ammonium chloride, treated wood, chromated copper arsenate, CCA, durability, southern pine, wood decay, exposure tests
Source: WCTE 2006 : 9th World Conference on Timber Engineering, August 6-10, 2006, Portland, OR, USA : program and abstracts. Portland, Or. : World Conference on Timber Engineering, [2006]: [5] pages.
Year: 2006
The influence of four fire-retardant systems on the planar (rolling) shear properties of structural hardwood plywood is evaluated using two possible ASTM D2718 test methodologies: the plate-shear method and the five-point flexural shear method. Knowing the planar shear properties and the potential…
Author(s): Nadir Ayrilmis, Jerrold E. Winandy
Keywords: Fireproofing agents, flexure, plywood, deterioration, elasticity, shear, modulus of elasticity, durability, shear strength, fire resistant wood, FRT plywood, fire retardants, ASTM D 2718, bending strength
Source: Forest products journal. Vol. 57, no. 4 (Apr. 2007): pages 44-49.
Year: 2007
Small specimens of sheathing-grade oriented strandboard (OSB) and sheathing-grade plywood were evaluated for retention of mechanical properties in exterior exposure over a series of exposure times. In contrast to previous studies of this nature, specimens at prolonged exposure times were also…
Author(s): Charles G. Carll, Alex C. Wiedenhoeft
Keywords: Weathering, particle board, mechanical properties, deterioration, wood-decaying fungi, biodegradation, plywood, accelerated life testing, exposure, resistance to decay, moisture, decay fungi, durability, OSB, oriented strandboard, decay, physical properties
Source: 41st International Wood Composites Symposium proceedings : March 26-28, 2007, Seattle, WA. [Pullman, Wash.] : Washington State University, 2007: 16 pages.
Year: 2007
In developing new adhesives for wood bonding, the testing of bond performance can often be a limiting factor in the development process. Evaluating the bond performance of an adhesive that can be prepared in less than a day often takes several days using standard performance tests. This testing…
Author(s): James M. Wescott, Michael J. Birkeland, Amy E. Traska, Charles R. Frihart, Brice N. Dally
Keywords: wood moisture, deterioration, adhesion, adhesives, testing, moisture content, rapid testing, ABES, Automated Bond Evaluation System, failure, failures in wood, strength, wood bonding, bonding, bond strength, durabilty
Source: Proceedings : 30th annual meeting of the Adhesion Society, Inc. : February 18-21, 2007, Tampa Bay, FL. [S.l. : s.n.], c2007: pages 219-221.
Year: 2007
The term “wood-plastic composites” refers to any number of composites that contain wood (of any form) and either thermoset or thermoplastic polymers. Thermosets or thermoset polymers are plastics that, once cured, cannot be remelted by heating. These include cured resins, such as epoxies and…
Author(s): Daniel F. Caulfield, Craig Clemons, Rodney E. Jacobson, Roger M. Rowell
Keywords: Thermoplastic composites, biodegradation, deterioration, composite materials, fibers, wood flour, moisture, weathering, wood fibers, wood-plastic materials
Source: Handbook of wood chemistry and wood composites. Boca Raton, Fla. : CRC Press, 2005: pages 365-378.
Year: 2005
Wood is used to produce many products (structural and nonstructural) for applications in which its natural properties are adequate. With the decrease of wood availability and the increase of less durable, younger and faster-growing trees, it is possible to modify wood in various ways to improve the…
Author(s): Rebecca E. Ibach, W. Dale Ellis
Keywords: Composite materials, fire testing, weathering, monomers, synthetic gums, synthetic resins, deterioration, water-soluble polymers, plastic-impregnated wood, polymerization, Crosslinking (polymerization), mechanical properties, biodegradation, impregnation, wood-plastic composites, polymers, crosslinking (molecular)
Source: Handbook of wood chemistry and wood composites. Boca Raton, Fla. : CRC Press, 2005: pages 421-446.
Year: 2005