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- W2178403734 abstract "Wood-plastic lumber is promoted as a low-maintenance high-durability product. After weathering, however, wood-plasticcomposites (WPCs) often fide and lose mechanical properties. In the first part ofthis study, 50%wood-flour-filled high-density polyethylene (HDPE) composite samples were injection molded or extruded. Composites were exposed to two accelerated weathering cycles in a xenon-arc type weathering apparatus; either ultraviolet (UV) light only or UV light and water spray. The composites lightened less when they were exposed to only UV light compared with exposure to UV light and water spray. The change in modulus of elasticity(MOE) and strength was also much less when the composites were exposed to UV light only. The second part of the study involved stabilizing the WPCs with an ultraviolet absorber and or pigment. The stabilized composites were also exposed to the two weathering cycles. Again the amount of lightening and loss in mechanical properties was less when the composites were exposed to UV light only compared with exposure to UV light and water spray. The pigment was more effective than the ultraviolet absorber retaining composite properties. The pigment had a larger impact on property retention when the composites were exposed to UV light and water spray. The results of this study demonstrate that exposing WPCs to water spray in combination with UV light is more severe than exposing WPCs to only UV light. This is likely a result of the water spray washing away the degraded layer and wood extractives during weathering, as well as causing the wood-plastic interface to be compromised through dimensional changes in the wood particles." @default.
- W2178403734 created "2016-06-24" @default.
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- W2178403734 date "2005-01-01" @default.
- W2178403734 modified "2023-09-24" @default.
- W2178403734 title "Changes in wood flour/HDPE composites after accelerated weathering with and without water spray" @default.
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