RELATING WOOD CHEMISTRY AND STRENGTH: PART II. FUNDAMENTAL RELATIONSHIPS BETWEEN CHANGES IN WOOD CHEMISTRY AND STRENGTH OF WOOD
Keywords:
Keywords, Chemistry, Mechanical Properties, Decay, Treatments, Thermal EffectsAbstract
ABSTRACT
In Part I of this series, the relationship between physical properties and chemistry andanatomy of wood were reviewed (Winandy 2016). This Part II article explores a fundamental relationship between the mechanical properties and the chemical composition of wood and how degradation of its individual chemical components affects strength loss. It then presents a proposal for a universal theory as to the fundamental mechanism between wood strength loss and changing wood chemistry. That theory purports that the desequencing of the complex lignocellulosic structure of woody materials involves the same systematic series of processes during either biological, chemical, or thermal deterioration. The goal of this article is to create a better understanding of how changes in wood chemistry fundamentallyinfluence wood strength.
References
Bodig J, Jayne BA (1982) Mechanics of wood and wood composites. Van Nostrand Reinhold. New York, NY. 712p.
Clausen CM, Kartal N (2003) Accelerated detection of brown-rot decay: Comparison of soil-block test, chemical analysis, mechanical properties, and immunodetection. Forest Prod J 53(11/12):90-94.
Curling SF, Clausen CM, Winandy JE (2002) Relationships between mechanical properties, weight loss, and chemical composition of wood during incipient brown-rot decay. Forest Prod J 52(7/8):34-39.
Fengel D, Wegener G (1984) Wood: Chemistry, ultrastructure, reactions. DeGruyter. Berlin. 613p.
Green DW, Evans J, Craig B (2003) Durability of structural lumber products at high temperatures. Part I. 66oC at 75% RH and 82oC at 30% RH. Wood Fiber Sci 35(4):499-523.
Harris JF (1975) Acid hydrolysis and dehydration reactions for utilizing plant carbohydrates. Applied Polymer Symposium No. 28:131-144. J.Wiley & Sons., New York, NY.
Lebow PK, Winandy JE (1999) Verification of the kinetics-based model for long-term effects of fire retardants on bending strength at elevated temperatures Wood Fiber Sci 31(1):49-61.
LeVan SM, Ross RJ, Winandy JE (1991) Effects of fire retardant chemicals on the bending properties of wood at elevated temperatures. USDA Research Paper FPL-PR-498. Madison, WI.
Mark H (1940) Intermicellar hole and tube system in fiber structure. J Phys Chem 44:764-787.
Mark RE (1967) Cell Wall Mechanics of Tracheids; Yale Press: New Haven, CT, 310 p.
Rowell RM (1984) The Chemistry of Solid Wood. Advances in Chemistry Series No. 207, American Chemical Society, Washington, DC.
Rowell RM, Pettersen R. Han JS, Rowell JS, Tshabalala MA (2005) Cell wall chemistry. . in RM Rowell,ed. The handbook of wood chemistry and wood composites. Taylor & Francis, Boca Raton, FL. 487p.
Sjostrom E (1981) Wood Chemistry: Fundamentals and applications. Academic Press. New York,NY. 223p.
Stamm AJ (1964) Wood and Cellulose Science, Ronald Press. New York, NY. 549p.
USDA (2010) Wood handbook. U.S. Department of Agriculture, Forest Service. General Technical Report GTR-190, Madison, WI.
Wilcox WW (1968) Changes in wood microstructure through progressive stages of decay.
USDA FS Research Report FPL-RP-70. Forest Products Laboratory, Madison, WI.
Wilcox WW (1978) Review of literature on the effects of early stages of decay on wood strength. Wood Fiber Sci 9(4):252-257.
Winandy JE (1994) Effects of long-term elevated temperature on CCA-treated southern pine lumber. Forest Prod J 44(6):49-55.
Winandy JE (1995) The effects of fire retardant treatments after 18 months exposure at 150 F (66oC). USDA Research Note FPL-RN-0264. Madison, WI.
Winandy JE (2016) Relating wood chemistry and strength. Part I. Wood structure and chemistry. Pages 92-102 in SM LeVan-Green, ed. Proc. Soc. of Wood Science and Technology (swst.org). Monona WI. 277pg.
Winandy JE, Krzysik AM (2007) Thermal degradation of wood fibers during hot-pressing of MDF composites: Part I. Relative effects and benefits of thermal exposure. Wood Fiber Sci. 39(3):450-461.
Winandy JE, Lebow PK (1996) Kinetic model of the effects of fire retardants at elevated temperatures. Wood Fiber Sci 28(1):39-52.
Winandy JE, Lebow PK (2001) Modeling wood strength as a function of chemical composition: An individual component model for Southern Pine. Wood Fiber Sci 33(2):239-254.
Winandy JE, Morrell JJ (1993) Relationship between incipient decay, strength, and chemical composition of Douglas-fir heartwood. Wood Fiber Sci, 25(3):278-288.
Winandy JE, Rowell RM (2005) Chemistry of wood strength. in RM Rowell, ed. The handbook of wood chemistry and wood composites. Taylor & Francis, Boca Raton, FL. 487p.
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