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Your search keyword '"Wood-Plastic-Composite"' showing total 2 results
Start Over Descriptor "Wood-Plastic-Composite" Topic mechanical properties
2 results on '"Wood-Plastic-Composite"'

1. Studies on Mechanical Performance of Wood-Plastic Composites: Polystyrene-Eucalyptus globulus Labill.

Author

Flores-Hernández, Miguel Ángel, Torres-Rendón, José Guillermo, Jiménez-Amezcua, Rosa María, Lomelí-Ramírez, María Guadalupe, Fuentes-Talavera, Francisco Javier, Silva-Guzmán, José Antonio, and García Enriquez, Salvador

Subjects
*WOODWORK, *POLYSTYRENE, *EUCALYPTUS globulus, *YOUNG'S modulus, *ULTIMATE strength, *DEFLECTION (Mechanics)
Abstract

The effects of size and concentration of wood particles on the properties of composites, obtained by extrusion, were evaluated based on polystyrene and wood particles from Eucalyptus globulus Labill. Woodplastic ratios were 10:90, 30:70, and 50:50 (weight/weight), and wood particles were retained in 40, 50, 65, and 100-mesh sieves. The density, flow index, water absorption, and the mechanical properties were evaluated. Scanning electron microscopy revealed poor adhesion between the wood particles and the polystyrene. The size and content of wood particles were found to have a strong influence on the mechanical properties of the composite. The introduction of the wood particles induced a reduction of the Young's modulus, ultimate strength and deflection, as well as an increment in the elongation at break. The impact resistance also increased with the size and concentration of the wood particles. Furthermore, with increasing content of wood particles, the value of the melt flow index decreased and the water absorption rose. [ABSTRACT FROM AUTHOR]

Published
2017
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2. Resistance of Injection Molded Wood-Polypropylene Composites against Basidiomycetes According to EN 15534-1 : New Insights on the Test Procedure, Structural Alterations, and Impact of Wood Source

Author

Tim Koddenberg, Christian Brischke, Andreas Buschalsky, Kim C. Krause, Andreas Krause, and Holger Militz

Subjects
0106 biological sciences, Materials science, wood–moisture interaction, x-ray micro-computed tomography, wood–polypropylene composites, Young's modulus, mechanical properties, 01 natural sciences, Biomaterials, symbols.namesake, Flexural strength, Fagus sylvatica, lcsh:TP890-933, 010608 biotechnology, lcsh:TP200-248, Wood-Plastic-Composite, Composite material, Beech, lcsh:QH301-705.5, Civil and Structural Engineering, Trametes versicolor, 040101 forestry, Moisture, biology, wpc, fungi, Wood-plastic composite, technology, industry, and agriculture, Picea abies, basidiomycetes, lcsh:Chemicals: Manufacture, use, etc, 04 agricultural and veterinary sciences, biology.organism_classification, lcsh:QC1-999, en 15534-1, lcsh:Biology (General), Mechanische Eigenschaft, Mechanics of Materials, Ceramics and Composites, symbols, durability test, ddc:660, 0401 agriculture, forestry, and fisheries, lcsh:Textile bleaching, dyeing, printing, etc, 660 Technische Chemie, lcsh:Physics
Abstract

In this study, we investigated injection molded wood-polypropylene composites based on various wood sources and their decay resistance against white rot (Trametes versicolor) and brown rot (Coniophora puteana) in a laboratory test according to EN 15534-1:2014. The manufactured composites consisted of poplar (Populus spp.), willow (Salix spp.), European beech (Fagus sylvatica L.), Norway spruce (Picea abies (L.) H. Karst.), and a commercial wood source (Arbocel&reg, C100), respectively. All formulations were compounded on a co-rotating twin screw extruder and subsequently injection molded to wood&ndash, PP specimens with a wood content of 60% or 70% by weight. It was found that the test procedure had a significant effect on the mechanical properties. Loss in mechanical properties was primarily caused by moisture and less by fungal decay. Moisture caused a loss in the modulus of rupture and modulus of elasticity of 34 to 45% and 29 to 73%, respectively. Mean mass and wood mass losses were up to a maximum of 3.7% and 5.3%, respectively. The high resistance against fungal decay was generally attributed to the encapsulation of wood by the polymer matrix caused by sample preparation, and enhanced by reduced moisture uptake during the preconditioning procedure. Notable differences with respect to the wood particle source and decay fungi were also observed. Structural characterization confirmed the decay pattern of the fungi such as void cavities close the surface and the deposition of calcium oxalates.

Published
2019

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