Composite wood products
Taherh Gholipor
Abstract
In this study the effect of type of polymer including polyvinyl chloride and high density polyethylene in production of wood plastic composite by using of canola straw waste in two forms, with and without pith (depithed), in combination with wood flour were investigated. Five levels of lignocellulosic ...
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In this study the effect of type of polymer including polyvinyl chloride and high density polyethylene in production of wood plastic composite by using of canola straw waste in two forms, with and without pith (depithed), in combination with wood flour were investigated. Five levels of lignocellulosic materials were used consisting of 100 % wood flour, 100% canola flour including pith, 100% depithed canola flour, 50% wood flour plus 50% canola flour with pith and 50% wood flour plus 50% depithed canola flour. Physical properties of boards including, thickness swelling and water absorption after 2 and 24 hours immersion in water and mechanical properties such as screw withdrawal strength perpendicular on the surface, flexural strength and modulus of elasticity according to EN were evaluated. The results of this study showed that wood plastic composite made of high density polyethylene had better physical and mechanical properties compared with polyvinyl chloride and using of canola flour combined with wood flour lead to increasing flexural strength and modulus of elasticity, but decreased screw withdrawal strength perpendicular on the surface. Using of lignocellulosic filler material by combining of 50% wood flour plus 50 % depithed canola flour combined with high density polyethylene powder can be produced wood plastic composite board with suitable physical and mechanical properties.
Composite wood products
Hamid Aibaghi esfahani; Mehdi Kalagar; Elham Marzban moridani
Abstract
In this study, mechanical properties of high density polyethylene (as matrix) and olive mill sludge (as filler / reinforcement) composites were investigated. There levels of paper sludge (15, 30, 40 and 50 wt %) were used to produce composites. The effect of maleic anhydride grafted polyethylene (MAPE) ...
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In this study, mechanical properties of high density polyethylene (as matrix) and olive mill sludge (as filler / reinforcement) composites were investigated. There levels of paper sludge (15, 30, 40 and 50 wt %) were used to produce composites. The effect of maleic anhydride grafted polyethylene (MAPE) as coupling agent on the mechanical properties composite was investigated and then, these composites (with coupling agent) were compared with composites without coupling agent. For blending materials from extruder and produce of mechanical standard sample from injection molding were used. Mechanical properties containing tensile properties (modulus of elasticity and tensile strength) and impact strength were studied. The result of obtaining from modulus of elasticity showed that with adding olive mill sludge to the polyethylene cause to signification increasing in modulus of elasticity were compared to pure polyethylene. Tensile strength composite increasing with adding olive mill sludge compared to pure polyethylene but maximum measure of tensile strength related to composites contain 30% olive mill sludge and coupling agent. Also adding 15% olive mill sludge to polyethylene cause to improved impact strength in compared pure polyethylene, but with adding more olive mill sludge (30, 40 and 50%), impact strength in composites were decreased. The used of coupling agent in the total manufactured composite cause to improved in impact strength of composites. The addition of a coupling agent (MAPE) to the composition resulted in an increase in mechanical properties of the composites that indicating enhanced matrix–olive mill sludge interfacial adhesion.
Composite wood products
Majid Chahar mahal; Saeid Kazemi najafi; Mehdi Tajvidi; Reza Hajihassani
Abstract
Wood -Plastic panels were made from high density polyethylene (as resin) and MDF waste and particleboard waste (as natural fiber) at 60, 70 and 80% by weight fiber loading. Density and dimensions of the panels were 1g/cm3and 35*35*1 cm, respectively. Physical properties of the panels including equilibrium ...
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Wood -Plastic panels were made from high density polyethylene (as resin) and MDF waste and particleboard waste (as natural fiber) at 60, 70 and 80% by weight fiber loading. Density and dimensions of the panels were 1g/cm3and 35*35*1 cm, respectively. Physical properties of the panels including equilibrium moisture content, long term water uptake and thickness swelling behavior were studied.Results indicated that equilibrium moisture content, maximum water uptake and thickness swelling of wood plastic samples increased with the increase in fiber content from 60% to 80%. Moreover, samples with higher fiber content faster reach to saturation point.
Composite wood products
Majid Chaharmahali; Saeid Kazemi najafi; Mehdi Tajvidi
Abstract
The possibility of producing wood-plastic panels using two methods including melt blend and dry blend was studied in this research. Methods were compared with each other in order to select the best. Wood-Plastic panels were made from high density polyethylene (as resin) and particle board waste (as natural ...
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The possibility of producing wood-plastic panels using two methods including melt blend and dry blend was studied in this research. Methods were compared with each other in order to select the best. Wood-Plastic panels were made from high density polyethylene (as resin) and particle board waste (as natural fiber) at 60, 70 and 80% by weight fiber loading. Density and dimensions of the panels were lg/cm3 and 35*35*1 cm, respectively. Mechanical properties of the panels including flexural modulus, flexural strength, screw and nail withdrawal resistance, and impact strength were under investigation. Maximum values of flexural modulus of wood plastic panels were found at 70% fiber content in both methods. Flexural strength, screw and nail withdrawal resistance and impact strength of wood plastic composites reduced with the increase in fiber content from this is not a reduction 60% to 80% is increase. Mechanical properties of samples made with dry blend method were generally higher than those of samples made with melt blend method for an corresponding formulations.
