Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub

    Description

    Composites of wood in a thermoplastic matrix (wood–plastic composites) are considered a low maintenance solution to using wood in outdoor applications. Knowledge of moisture uptake and transport properties would be useful in estimating moisture-related effects such as fungal attack and loss of mechanical strength. Our objectives were to determine how material parameters and their interactions affect the moisture uptake and transport properties of injection-molded composites of wood-flour and polypropylene and to compare two different methods of measuring moisture uptake and transport. A two- level, full-factorial design was used to investigate the effects and interactions of wood- flour content, wood-flour particle size, coupling agent, and surface removal on moisture uptake and transport of the composites. Sorption and diffusion experiments were performed at 208C and 65 or 85% relative humidity as well as in water, and diffusion coefficients were determined. The wood-flour content had the largest influence of all parameters on moisture uptake and transport properties. Many significant interactions between the variables were also found. The interaction between wood-flour content and surface treatment was often the largest. The diffusion coefficients derived from the diffusion experiments were different from those derived from the sorption experiments, suggesting that different mechanisms occur.

    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.

    Citation

    Steckel, Vera; Clemons, Craig Merrill; Thoemen, Heiko. 2007. Effects of material parameters on the diffusion and sorption properties of wood-flour/polypropylene composites. Journal of applied polymer science. Vol. 103 (2007): pages 752-763.

    Keywords

    Wood-flour, polypropylene, composites, diffusion, sorption, moisture, service life, injection molding of plastics, composite materials, deterioration, wood plastic composites, mechanical properties, thermoplastic composites, absorption, adsorption, humidity, moisture content, wood plastic materials

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page