Mechanical and physical properties of core–shell structured wood plastic composites: Effect of shells with hybrid mineral and wood fillers

2013 ◽  
Vol 45 (1) ◽  
pp. 1040-1048 ◽  
Author(s):  
Birm-June Kim ◽  
Fei Yao ◽  
Guangping Han ◽  
Qingwen Wang ◽  
Qinglin Wu
Keyword(s):  
Physical Properties ◽  
Core Shell ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Mechanical And Physical Properties

Effects of Antioxidants Content on the Physical and Mechanical Properties of Wood Plastic Composites

2011 ◽  
Vol 471-472 ◽  
pp. 151-156 ◽  
Author(s):  
Mohd Hafizuddin Ab Ghani ◽  
Ahmad Haji Sahrim
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
High Density Polyethylene ◽  
Natural Fibers ◽  
Physical And Mechanical Properties ◽  
Screw Extruder ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Mechanical And Physical Properties ◽  
Twin Screw

We investigated the effects of amount of antioxidants variability on selected mechanical and physical properties of wood plastic composites. Recycled high density polyethylene (rHDPE) and natural fibers were compounded into pellets by compounder, then the pellets were extruded using co-rotating twin-screw extruder and test specimens were prepared by hot and cold press process. From the study, samples with 0.5 wt% of antioxidants produce the highest strength and elasticity of composites. The effect of antioxidants presence on water uptake is minimal.

scholarly journals Effects of geometric particle sizes of wood flour on strength and dimensional properties of wood plastic composites

2013 ◽  
Vol 5 (1) ◽  
pp. 194-199
Author(s):  
D. N. Izekor ◽  
S. O. Amiandamhen ◽  
O. S. Agbarhoaga
Keyword(s):  
Physical Properties ◽  
Wood Flour ◽  
Particle Sizes ◽  
Thickness Swelling ◽  
Wood Plastic Composites ◽  
Dimensional Properties ◽  
Mean Values ◽  
Plastic Composites ◽  
Mechanical And Physical Properties ◽  
Plastic Ratio

The effect of different wood flour sizes on strength and dimensional properties of wood-plastic composites were examined. Wood flour of different particle sizes viz; 1.00mm, 2.00mm and >2.00mm were compounded with recycled low-density polyethylene (LDPE) at different wood/plastic ratio of 1: 1, 2: 3 and 3: 2. The results obtained showed that wood flour size > 2.00mm has the highest MOR and MOE values of 1.206N mm-2 and 2484.72Nmm-2 while wood flour size of 1.00mm had the lowest MOR and MOE values of 0.505Nmm-2 and 2195.89Nmm-2 respectively. Also the results of the physical properties showed that wood flour size of 1.00mm had the lowest thickness swelling percentage with mean values of 0.28% and 2.08% while water absorption percentage has mean values of 0.91% and 10.58% after 2 hours and 24 hours of water immersion respectively. It was observed that wood flour size of 2.00mm and particle size >2.00mm had the highest thickness swelling and water absorption percentages. This showed that strength properties of wood plastic composites increased with increased particle sizes whereas its dimensional properties increased with decreased particle sizes. The results of analysis of variance carried out on mechanical and physical properties showed that particle sizes and wood/plastic ratio had a significant effect on the mechanical and physical properties of wood plastic composites (p 0.05).

scholarly journals A Comprehensive Review on Process and Technological Aspects of Wood-Plastic Composites

2021 ◽  
Vol 9 (2) ◽  
pp. 329
Author(s):  
Sumit Manohar Yadav ◽  
Muhammad Adly Rahandi Lubis ◽  
Kapil Sihag
Keyword(s):  
Recent Progress ◽  
Raw Materials ◽  
Morphological Properties ◽  
Manufacturing Processes ◽  
Wood Fibers ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Mechanical And Physical Properties ◽  
Recent Developments ◽  
Manufacturing Methods

This review deals with recent works on the process and technological aspects of wood-plastic composites (WPCs) manufacturing.The term WPCs relates to any composites that contain plant (including wood and non-wood) fibers and thermosets or thermoplastics. Recent progress relevant to wood-plastic composites has been cited in this review. This articleintended to outline the results presented on wood-plastic composites focusing on process and technological aspects such as raw materials, fabrication, mechanical, physical, thermal, and morphological properties. The manufacturing process of WPCs is an important aspect of WPCs production. Manufacturing methods like compression molding and pultrusion have some limitations. Extrusion and injection molding are the most widely used manufacturing processes in WPCs due to their effectiveness. Recent developments dealing with WPCs and the use of different kinds of nanofillers in WPCs have also been presented and discussed. Nanoclays are widely used as nanofillers in WPCs because they represent an eco-friendly, readily available in large quantity, and inexpensive filler. WPCs are finding applications in many fields ranging from the construction to the automotive industry.Keywords: additive manufacturing, adhesion, fabrication techniques, mechanical and physical properties, wood-plastic composites

scholarly journals Thermal decomposition kinetics of core-shell structured wood-plastic composites: Effect of white mud loadings on the shell layer

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2747-2762
Author(s):  
Yu Xian ◽  
Cuicui Wang ◽  
Ge Wang ◽  
Leemiller Smith ◽  
Haitao Cheng
Keyword(s):  
Activation Energy ◽  
Thermal Decomposition ◽  
Decomposition Kinetics ◽  
Thermal Decomposition Kinetics ◽  
Core Shell ◽  
Shell Layer ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
White Mud ◽  
Kinetics Of

This study inspected the thermal decomposition kinetics of core-shell structured wood-plastic composite material with white mud loading in the shell. The thermal decomposition was studied via thermogravimetric analysis under nitrogen atmosphere. Experiments were performed at different heating rates of 5, 10, 20, 30, and 40 °C/min from ambient temperature to 700 °C. Multivariate linear regression analysis was applied to estimate the activation energy with the Flynn–Wall–Ozawa method, and the thermal aging life equations of composites were obtained as described in ASTM E1877 (2000). The results showed that the combustion characteristic parameters (T5%, Tp1, Tp2, and Tp3) increased at first and then decreased with increased white mud concentration. Accordingly, the average apparent activation energy (Ea) values of thermal decomposition with conversion rates ranging between 20% and 80% were 222 kJ/mol for high-density polyethylene (HDPE) shell layer and the average values of 201, 226, 201, 207, and 223 kJ/mol were achieved with white mud loading of 5, 10, 15, 20, and 25% in the shell layer, respectively. There were no remarkable dependencies among them. The service life tf (min) and the service temperature T (K) of the core-shell structured wood-plastic composites were experimentally determined.

Effects of Premixing Wood Flour with Compatibilizer with Different Characteristics on the Physical and Mechanical Properties of Wood/Plastic Composites

2019 ◽  
Vol 69 (2) ◽  
pp. 141-147
Author(s):  
Kazushige Murayama ◽  
Yoichi Kojima ◽  
Hikaru Kobori ◽  
Kenji Aoki ◽  
Shigehiko Suzuki ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Physical Properties ◽  
Shear Viscosity ◽  
Wood Flour ◽  
Physical And Mechanical Properties ◽  
Plastic Composites ◽  
Mechanical And Physical Properties ◽  
One Step ◽  
Mixing Method

Abstract The addition of maleic anhydride (MA)-modified polypropylene (MAPP) as a compatibilizer increases mechanical and physical properties of wood/plastic composites (WPCs). It is thought that MA graft ratio (Gr), molecular weight (weight-average molecular weight [Mw]), and mixing methods of MAPP affect physical and mechanical properties of WPCs. However, evaluation, especially for mixing order, is not enough. The objective of this study was to investigate the effect of Gr and Mw of MAPP and its mixing methods on the mechanical and physical properties of WPCs. Two types of mixing methods were used: mixing the MAPP with the filler using a Henschel mixer before kneading with PP (premixing method) and mixing all of the materials at one time (one-step mixing method). The WPCs made with the premixing method had lower shear viscosity and higher flexural modulus than those made with the one-step mixing method. The particle size, moisture content, and surface morphology of fillers are thought to be more important in determining the shear viscosity of WPCs than the MAPP itself. The highest tensile, impact, and flexural strengths of WPCs were obtained in the WPC with premixing with low-Gr and high-Mw MAPP. It may be due to the effective reaction of the wood flour with MAPP and higher entanglement between the MAPP and PP. These results suggest that the premixing method could improve productivity and mechanical properties of WPCs.

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