Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (649 KB)

Title: Evaluating physical property changes for small-diameter, plantation-grown southern pine after in situ polymerization of an acrylic monomer

Author: Bergman, Richard PhD; Ibach, Rebecca E.; LaPasha, Constantine; Denig, Joseph;

Date: 2009

Source: Forest products journal. Vol. 59, no. 10 (Oct. 2009): pages 64-71.

Publication Series: Scientific Journal (JRNL)

Description: Because of the large percentage of juvenile wood in small-diameter southern pine, this material has lower strength properties compared with the historic published values in the ASTM Standard D2555. Finding new, simple, and inexpensive ways of increasing these strength properties would increase the use of this material for residential construction. For this study, we chose in situ polymerization using the monomer 1,6-hexanediol dimethacrylate to enhance bending strength and stiffness. After determining the lower range of density, modulus of rupture (MOR), and modulus of elasticity (MOE) of juvenile wood from small southern pine logs, southern pine specimens were polymerized using both a vacuum-impregnation and a surface-application approach. The results showed some significant physical property increases for the fully impregnated material that used a large amount of monomer. Although the surface-application approach used less monomer, the physical properties of the juvenile wood did not increase as expected. Only the 1-minute dip treatment showed a significant increase in both bending stiffness and strength, with a weight gain of 11.9 percent. For the surface-application approach, monomer moving to the wood surface during polymerization reduced their effectiveness in increasing MOR and MOE to the expected levels. Therefore, the challenge is finding a method that maintains polymer loading inside the wood structure during the curing process.

Keywords: Composite materials, mechanical properties, elasticity, wood plastic composites, monomers, plastic-impregnated wood, deterioration, southern pines, bending, wood density, juvenile wood, polymers, polymerization, strength, wood-plastic materials, modulus of elasticity, impregnation, 1, 6-hexanediol dimethacrylate, smallwood, bending strength, small-diameter timber, small timbers, stiffness

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

XML: View XML

Citation:


Bergman, Richard; Ibach, Rebecca E.; LaPasha, Constantine; Denig, Joseph 2009. Evaluating physical property changes for small-diameter, plantation-grown southern pine after in situ polymerization of an acrylic monomer. Forest products journal. Vol. 59, no. 10 (Oct. 2009): pages 64-71.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.