1 edition of Biological resistance of southern pine and aspen flakeboards made from acetylated flakes found in the catalog.
Biological resistance of southern pine and aspen flakeboards made from acetylated flakes
|Statement||Roger M. Rowell ... [et al.].|
|Contributions||Rowell, Roger M., Forest Products Laboratory (U.S.)|
|The Physical Object|
|Pagination||p. 427-440 ;|
|Number of Pages||440|
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Flakeboards made from flakes acetylated by a new simplified dip acetic anhydride procedure are resistant to attack by brown- white- and soft-rot fungi and tunneling bacteria at acetyl weight.
and aspen control flakes and from acetylated flakes at various weight gains of acetyl (Table 2) show that biological protection is attained at about 10% weight gain in nonleached acetylated southern pine flakeboards, whereas leached flakeboards require about 15% weight gain to become resistant to attack.
Similar. By R.M. Rowell, G.R. Esenther, D.D. Nicholas, et al., Published on 01/01/ Title. Biological resistance of southern pine and aspen flakeboards made from acetylated Cited by: Get this from a library. Biological resistance of southern pine and aspen flakeboards made from acetylated flakes.
[Roger M Rowell; Forest Products Laboratory (U.S.);]. Flakeboards made from flakes acetylated by a new simplified dip acetic anhydride proce dure are resistant to attack by brown- white- and soft-rot fungi and tunneling bacteria at acetyl weight gains above 15%.
Acety lated flakeboards at 18 to 21 % acetyl weight gains are not completely resistant to attack by subterranean termites. Biological resistance of southern pine and aspen flakeboards made from acetylated flakesCited by: Rowell RM, Esenther GR, Nicholas DD, Nilsson T () Biological resistance of southern pine and aspen flakeboards made from acetylated flakes.
J Cited by: R.M. Rowell, G.R. Esenther, D.D. Nicholas, T. NilssonBiological resistance of southern pine and aspen flakeboards made from acetylated flakes Journal of Wood Chemistry and Technology, 7 (), pp. Cited by: BIOLOGICAL RESISTANCE OF ACETYLATED SPRUCE PARTICLEBOARDS AGAINST TO BROWN ROT FUNGI (Coniophora puteana) T., Biological Resistance of Southern Pine and Apsen Flakeboards Made from Acetylated Flakes, Journal of Wood Chemistry and Technology, 7(3), () R.M., Muahl, J.H.
Krzysik, A.M., Properties of Hardboards Made from Author: Eylem Dizman, Ümit Cafer Yıldız, Sibel Yıldız, Mustafa Aslan, Ali Temiz, Engin Derya Gezer. Abstract. To improve flakeboard dimensional stability and mechanical properties for long-term exterior exposure, we fabricated and tested a highly durable isocyanate-bonded acetylated flakeboard.
Flakeboards were tested for internal bond strength, thickness swell, modulus of elasticity, modulus of rupture, and breaking strength in bending, Cited by: 3. ketene-modified southern pine and aspen flakes showed very little loss in acetyl.
Flakeboards made from southern pine and aspen flakes treated with ketene showed a greatly reduced rate and extent of swelling resulting from liquid water sorption as compared to control boards. Similar results were obtained in swelling tests done in water vapor. The effects of fiber acetylation, resin content, and wax content on mechanical and physical properties.
of dry-process hardboard made from aspen and southern pine were investigated. Test results indicate that the modulus of rupture (MOR) and modulus of elasticity (MOE) of the.
hardboard specimens were decreased due to the fiber by: A comprehensive investigation of the effects of heat treatment and acetylation separately and together (combination treatment) on the fungal durability of jack pine wood against a brown rot fungus, Poria placenta (pp), and a white rot fungus, Trametes versicolor (tv) has also been by: 5.
Preliminary tests on strength properties show that flakeboards made from acetylated flakes had lower internal bond strengths than control boards.
It is not known if this reduction in internal bond strength is due to the effects of the acetylation procedure on the surface of the flakes, or to a failure in the resin adhering the flakes by: Southern pine, Douglas-fir, and aspen wood flakes were acetylated with acetic anhydride vapor and compared with flakes acetylated with liquid acetic anhydride diluted with xylene.
The rate of acetylation was much lower for the vapor than for the liquid phase reaction. Acetylation weight percent gains above 20 were achieved by both methods.
Flakeboards Made from Aspen and Southern Pine Wood Flakes Reacted with Gaseous Ketene. Status of the aspen parkland in the prairie provinces, J.S. Rowe; Provincial Museum of Alberta Natural History Occasional Paper.
Biological resistance of southern pine and aspen flakeboards made from acetylated flakes, R.M. Rowell, G.R. Esenther, D.D. Nicholas, and T. Nilsson; Journal of Wood Chemistry and Technology. Acetylation Plus Water-repellent Treatment of Wood in Slate Thickness Acetylation Plus Water-repellent Treatment of Wood in Slate Thickness Hafizoğlu, Harzemşah; Yildiz, Ümit Cafer Introduction The wood cell wall is composed of cellulose, hemicelluloses and lignin.
Hydroxyl and other oxygencontaining groups of these polymers attract moisture through. Reaction of lignocellulosic material with uncatalyzed acetic anhydride in the absence of any cosolvent is disclosed.
The process improves dimensional stability and resistance to biological attack of the lignocellulosic by: Biological resistance of southern pine and aspen flakeboards made from acetylated flakes. Wood Chem. Tech. 7(3) Table 1. -- Stability of acetyl groups in pine and aspen flakes after cyclic exposure between 90 and 30 percent RH.
(a) Acetyl content by cycle number Species 0 13 21 33 41 (%) Pine Aspen. Start studying Ch 3 construction. Learn vocabulary, terms, and more with flashcards, games, and other study tools. building panel made by bonding together large flat flakes of wood. wood that has been impregnated with preservative chemicals to increase its resistance to decay and biological attack.
creosote.PINE WOOD MODIFICATION BY HEAT TREATMENT IN AIR Bruno M. Esteves,a* Idalina J. Domingos,a and Helena M. Pereira b Maritime pine (Pinus pinaster) wood has low dimensional stability and durability. Heat treatment was made in an oven using hot air during 2 to 24 h and at ºC.
A comparison was made against steam heat treatment.Their first cabins, forts, furniture, and fuel all made use of Southern Pine. Southern Pine was one of the first species of wood exported from North America.
In the early ’s most of Europe was in dire need for wood and Southern Pine was imported for England’s ship construction, furniture, houses, and other building applications.