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Friday, July 31, 2020 | History

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

Biological resistance of southern pine and aspen flakeboards made from acetylated flakes

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  • 8 Currently reading

Published by Forest Products Laboratory in [Madison, Wis.? .
Written in English

    Subjects:
  • Southern pines -- United States.,
  • Aspen -- United States.,
  • Particle board -- United States.,
  • Adhesives.

  • Edition Notes

    StatementRoger M. Rowell ... [et al.].
    ContributionsRowell, Roger M., Forest Products Laboratory (U.S.)
    The Physical Object
    Paginationp. 427-440 ;
    Number of Pages440
    ID Numbers
    Open LibraryOL17661879M

    This book shows how chemical modifications influence some properties of wood nanocomposites. It describes suitable and effective chemical modifications that strengthen the physico-mechanical, thermal and morphological properties of wood. resistance polymer nanocomposites rahman decay samples mechanical properties. Fusiform rust disease of southern pines: Biology, ecology and management (Bulletin) [Schmidt, Robert A] on *FREE* shipping on qualifying offers. Fusiform rust disease of southern pines: Biology, ecology and management (Bulletin)Author: Robert A Schmidt.

    Influence of Pine Bark Particle Size and pH on Cation Exchange Capacity James E. Altland1, James C. Locke, and Charles R. Krause ADDITIONAL INDEX WORDS. container, nursery crops, nutrition, sphagnum moss exchange capacity (CEC) describes the . The bio-based phenol formaldehyde novolac resins were synthesized and characterized. The applications of these synthesized bio-based novolac PF resins in preparing thermal molding composites were also investigated. It was found that both acid catalysts were effective in the bark-phenol liquefaction for obtaining the adequate phenol substitutes Cited by: 2.

    Standard Grading rules For Southern Pine Lumber [Southern Pine Inspection Bureau] on *FREE* shipping on qualifying offers. Standard Grading rules For Southern Pine Author: Southern Pine Inspection Bureau. Comparative Decay Resistance of Heartwood of Yellow Poplar and Southern Pine A Research Proposal (Draft) Michael O. Hunt and Daniel L. Cassens Novem The Purdue Wood Research Laboratory has an ongoing research project with the goal of creating a niche market for pressure-treated, new-growth yellow poplarFile Size: 70KB.


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Biological resistance of southern pine and aspen flakeboards made from acetylated flakes Download PDF EPUB FB2

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.