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Properties of flat-pressed wood plastic composites containing fire retardants

Authors

  • Nadir Ayrilmis,

    Corresponding author
    1. Department of Wood Mechanics and Technology, Istanbul University, Forestry Faculty, Bahcekoy, Sariyer, 34473, Istanbul, Turkey
    • Department of Wood Mechanics and Technology, Istanbul University, Forestry Faculty, Bahcekoy, Sariyer, 34473, Istanbul, Turkey
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  • Jan T. Benthien,

    1. Department of Wood Science, Mechanical Wood Technology, Hamburg University, Leuschnerstrasse 91, 21031 Hamburg, Germany
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  • Heiko Thoemen,

    1. Department of Architecture, Wood and Civil Engineering, Bern University of Applied Science, Solothurnstrasse 102, 2500 Biel 6, Switzerland
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  • Robert H. White

    1. Department of Agriculture, Forest Products Laboratory, Madison, Wisconsin 53726
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Abstract

This study investigated physical, mechanical, and fire properties of the flat-pressed wood plastic composites (WPCs) incorporated with various fire retardants (FRs) [5 or 15% by weight (wt)] at 50 wt % of the wood flour (WF). The WPC panels were made from dry-blended WF, polypropylene (PP) with maleic anhydride-grafted PP (2 wt %), and FR powder formulations using a conventional flat-pressing process under laboratory conditions. The water resistance and strength values of the WPC panels were negatively affected by increasing the FR content as compared to the WPC panels without FR. The WPC panels incorporated with zinc borate (ZB) gave an overall best performance in both water resistance and strength values followed by the panels containing magnesium hydroxide (MH) and ammonium polyphosphate (APP). For these three FR's, the best fire resistance as measured in the cone calorimeter was obtained with the 15 wt % APP treatment and then followed by 15 wt % ZB, or 15 wt % MH formulations. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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