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    Description

    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.

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    Citation

    Ayrilmis, Nadir; Benthien, Jan. T.; Thoemen, Heiko; White, Robert H. 2011. Properties of flat-pressed wood plastic composites containing fire retardants. Journal of applied polymer science. Vol. 122, no. 5 (Dec. 5, 2011): p. 3201-3210.

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    Keywords

    Heat release rate, hot press molding, water resistance, WPC panel, strength, composite materials, fire testing, wood-plastic composites, polypropylene, thermoplastic composites, wood flour, mechanical properties, maleic anhydride, adsorption, fire retardants, flat pressing, moisture content, zinc borate, magnesium hydroxide, flammability, fire resistance, thermal degradation, cone calorimetry, ammonium polyphosphate, bonding, bond strength

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https://www.fs.usda.gov/treesearch/pubs/40873