Some Exploitation Properties of Wood Plastic Composites Based on Polypropylene and Plywood Production Waste

2016 ◽  
Vol 721 ◽  
pp. 48-52 ◽  
Author(s):  
Janis Kajaks ◽  
Karlis Kalnins ◽  
Sandris Uzulis ◽  
Juris Matvejs
Keyword(s):  
Water Resistance ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Production Waste ◽  
Birch Wood ◽  
Wood Plastic Composites ◽  
Polypropylene Composites ◽  
Plastic Composites ◽  
By Products

Three types of birch wood plywood by-products: plywood sanding dust (PSD), plywood sawdust (PSWD) and refined plywood scrap fibres (RPSF) and polypropylene composites exploitation properties (tensile, flexural modulus), microhardness water resistance and fluidity of composite melts, were evaluated. These investigations showed possibility of usage as excellent reinforcements for polypropylene presented by-products. For example tensile modulus increase up to 5 times, but flexural modulus till 2.3 times. Optimal content of PSD in polypropylene composites is 40 wt%, but in the cases of PSWD and RPSF 50 wt%.

Effects of the Size of Wood Flour on Mechanical Properties of Wood-Plastic Composites

2011 ◽  
Vol 393-395 ◽  
pp. 76-79 ◽  
Author(s):  
Hai Bing Huang ◽  
Hu Hu Du ◽  
Wei Hong Wang ◽  
Hai Gang Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Wood Flour ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Inorganic Filler ◽  
Full Potential ◽  
Wood Plastic Composites ◽  
Plastic Composites

In this article, wood-plastic composites(WPCs) were manufactured with wood flour(80～120mesh、40～80mesh、20～40mesh、10～20mesh) combing with high density polyethylene(HDPE). Effects of the size of wood flour on mechanical properies and density of composites were investigated. Results showed that particle size of wood flour had an important effect on properitiesof WPCs. Change of mesh number had a outstanding effect on flexural modulus, tensile modulus and impact strength, howere, little effect on flexural strength and tensile strength. When mesh number of wood flour changed from 80～120mesh to 10～20mesh,flexural modulus and tensile modulus were respectively enhanced by 42.4% and 28.4%, respectively, and impact strength was decreased by 35.5%.Size of wood flour basically had no effect on density of composite within 10～120mesh. The use of wood flour or fiber as fillers and reinforcements in thermoplastics has been gaining acceptance in commodity plastics applications in the past few years. WPCs are currently experiencing a dramatic increase in use. Most of them are used to produce window/door profiles,decking,railing,ang siding. Wood thermoplastic composites are manufactured by dispering wood fiber or wood flour(WF) into molten plastics to form composite materials by processing techniques such as extrusion,themoforming, and compression or injection molding[1]. WPCs have such advantages[2]：(1)With wood as filler can improve heat resistance and strength of plastic, and wood has a low cost, comparing with inorganic filler, wood has a low density. Wood as strengthen material has a great potential in improving tensile strength and flexural modulus[3]；(2) For composite of same volume, composites with wood as filler have a little abrasion for equipment and can be regenerated；(3)They have a low water absorption and low hygroscopic property, They are not in need of protective waterproof paint, at the same time, composite can be dyed and painted for them own needs；(4)They are superior to wood in resistantnce to crack、leaf mold and termite aspects, composites are the same biodegradation as wood；(5)They can be processed or connected like wood；（6）They can be processed into a lots of complicated shape product by means of extrusion or molding and so on, meanwhile, they have high-efficiency raw material conversion and itself recycle utilization[4]. While there are many sucesses to report in WPCs, there are still some issues that need to be addressed before this technology will reach its full potential. This technology involves two different types of materials: one hygroscopic(biomass) and one hydrophobic(plastic), so there are issues of phase separation and compatibilization[5]. In this paper, Effects of the size of wood powder on mechanical properties of WPCs were studied.

scholarly journals Improving the mechanical properties of polypropylene composites with coconut shell particles

2021 ◽  
Vol 30 ◽  
pp. 263498332110074
Author(s):  
Henry C Obasi ◽  
Uchechi C Mark ◽  
Udochukwu Mark
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Flexural Modulus ◽  
Filler Particle ◽  
Tensile Modulus ◽  
Coconut Shell ◽  
Polypropylene Composites ◽  
Increase With Increase ◽  
Pp Composites ◽  
Shell Particles

Conventional inorganic fillers are widely used as fillers for polymer-based composites. Though, their processing difficulties and cost have demanded the quest for credible alternatives of organic origin like coconut shell fillers. Dried shells of coconut were burnt, ground, and sifted to sizes of 63, 150, 300, and 425 µm. The ground coconut shell particles (CSP) were used as a filler to prepare polypropylene (PP) composites at filler contents of 0% to 40% via injection melt blending process to produce PP composite sheets. The effect of the filler particle size on the mechanical properties was investigated. The decrease in the size of filler (CSP) was found to improve the yield strength, tensile strength, tensile modulus, flexural strength, flexural modulus, and hardness of PP by 8.5 MPa, 15.75 MPa, 1.72 GPa, 7.5 MPa, 100 MPa, and 10.5 HR for 63 µm at 40%, respectively. However, the elongation at break and modulus of resilience of the PP composites were seen to increase with increase in the filler size. Scanning electron microscope analysis showed that fillers with 63 µm particle size had the best distribution and interaction with the PP matrix resulting in enhanced properties.

Heat Build-Up and Fire Performance of Wood-Polypropylene Composites Containing Recycled Mineral Wool

2013 ◽  
Vol 849 ◽  
pp. 269-276
Author(s):  
Olli Väntsi ◽  
Timo Kärki
Keyword(s):  
Heat Release ◽  
Polymer Matrix ◽  
Mineral Wool ◽  
Fire Performance ◽  
Wood Plastic Composites ◽  
Polypropylene Composites ◽  
Plastic Composites ◽  
Wool Fibers ◽  
Residual Masses ◽  
Heat Build Up

The heat build-up and fire performance of wood plastic composites containing recycled mineral wool filler were investigated. Six wood polypropylene composites with recycled mineral wool content between 0 % and 64 % were evaluated. It was found that the heat build-up of the studied composites increased with initial addition of recycled mineral wool, but increasing the content of recycled mineral wool in the composites further did not have a notable effect onthe heat build-up. Fire performance investigation showed that the addition of recycled mineral wool into the composites did not decrease the magnitude of heat release rate peak, but decreased the total heat release of the composites. Investigation of residual masses after the pyrolysis demonstrated a good dispersion of recycled mineral wool fibers in the polymer matrix. It is concluded that fire protection of the polymer matrix is essential when developing the fire performance of wood plastic composites with recycled mineral wool as filler.

Wood plastic composites made with thermally modified birch wood residues

2016 ◽  
Vol 7 (4) ◽  
pp. 225-230 ◽  
Author(s):  
E. Kuka ◽  
D. Cirule ◽  
J. Kajaks ◽  
I. Andersone ◽  
B. Andersons
Keyword(s):  
Birch Wood ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Wood Residues

Mechanical Properties of Acrylate-Styrene-Acrylonitrile/Bagasse Composites

2013 ◽  
Vol 747 ◽  
pp. 355-358 ◽  
Author(s):  
Pornsri Pakeyangkoon ◽  
Benjawan Ploydee
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Flexural Modulus ◽  
Wood Plastic Composite ◽  
Wood Plastic Composites ◽  
Plastic Composite ◽  
Plastic Composites ◽  
Roll Mill ◽  
The Matrix ◽  
Styrene Acrylonitrile

Mechanical properties of wood plastic composite, prepared from acrylate-styrene-acrylonitrile (ASA) and bagasse, were investigated. In this study, 10 to 50 phr of bagasse were used in order to obtain the wood plastic composite with superior mechanical properties. The wood plastic composites in the study were prepared by melt-blending technique. All materials were mixed by using a two-roll-mill, shaped into sheets by a compression molding machine and the specimens were cut with a cutting machine. Youngs modulus, flexural strength, flexural modulus, impact strength and hardness of the wood plastic composites were investigated and found to improve with increasing bagasse content. However, some composite properties, i.e., impact strength, was decreased by adding the bagasse and then become steady when the amount of bagasse added was more than 30 phr. It was concluded that wood plastic composites with the desirable mechanical properties can be formulated using ASA as the matrix polymer and 50 phr of bagasse.

scholarly journals Some Exploitation Properties of Wood Plastic Hybrid Composites Based on Polypropylene and Plywood Production Waste

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Janis Kajaks ◽  
Karlis Kalnins ◽  
Sandris Uzulis ◽  
Juris Matvejs
Keyword(s):  
Coupling Agent ◽  
Water Resistance ◽  
Hybrid Composites ◽  
Wood Flour ◽  
Flexural Modulus ◽  
Barrier Properties ◽  
Waste Materials ◽  
Industry Waste ◽  
Plywood Industry ◽  
By Products

AbstractDuring the last 20–30 years many researchers have paid attention to the studies of properties of thewood polymer composites (WPC). A lot of works are closely related to investigations of exploitation properties of wood fibres or wood flour containing polyolefine composites [1, 2]. The most useful from wide selection of polyolefines are polypropylenes, but timber industry waste materials comprising lignocellulose fibres are often used as reinforcement of WPC [3–12]. Plywood industry is not an exception – part of waste materials (by-products) are used for heat energy, i.e. burned. In this work we have approbated reinforcing of polypropylene (PP) with one of the plywood industry by-products, such as birch plywood sawdust (PSWD),which containswood fibre fractions with different length [13]. The main fraction (50%) includes fibres with length l = 0.5 − 1 mm. Our previous study [13] has confirmed that PSWD is a promising filler for PP reinforcing. Addition of PSWD up to 40–50 wt.% has increased WPC tensile and flexural modulus, but decreased deformation ability of PP matrix, impact strength, water resistance and fluidity of composite melts. It was shown [13] that modification of the composites with interfacial modifier – coupling agent maleated polypropylene (MAPP content up to 5–7 wt.%) considerably improved all the abovementioned properties. SEM investigations also confirmed positive action of coupling agent on strengthening of adhesion interaction between components wood and PP matrix. Another way how to make better properties of the WPC is to form hybridcomposites [1, 14–24]. Very popular WPC modifiers are nanoparticle additions like organonanoclays, which increase WPC physical-mechanical properties - microhardness, water resistance and diminish barrier properties and combustibility [1, 2, 14–17, 19, 20]. The goal of this study was to investigate organonanoclays influence on plywood production industry by-product birch plywood sawdust (PSWD) containing polypropylenewood hybrid composites (WPHC) physical-mechanical and other exploitation properties.

scholarly journals Hybrid green organic/inorganic filler polypropylene composites: Morphological study and mechanical performance investigations

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 710-721
Author(s):  
Mohammed T. Hayajneh ◽  
Faris M. AL-Oqla ◽  
Mu’ayyad M. Al-Shrida
Keyword(s):  
Mechanical Performance ◽  
Hybrid Composites ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Inorganic Filler ◽  
Hybrid Filler ◽  
Polypropylene Composites ◽  
Polypropylene Matrix ◽  
Mechanical Performances ◽  
Flexural Tests

Abstract In this study, the morphological and mechanical performances of hybrid green organic and inorganic filler composites were investigated. Various hybrid reinforcements using natural waste fillers including lemon leaves and eggshells were utilized for the study. The tensile strength, tensile modulus, elongation to break, flexural strength, and flexural modulus were investigated for the composites with polypropylene matrix. The results revealed that eggshells composites had the best values for both tensile and flexural tests while lemon leaves composites had the lowest values. However, the hybrid filler (lemon leaves-eggshells) had intermediate values. The poor properties of lemon leaves were attributed to the agglomeration and weak bonding presented by the morphological analysis of the hybrid composites.

Adhesion Investigations of Systems Based on Birch Plywood and Wood Plastic Composites

2020 ◽  
Vol 850 ◽  
pp. 76-80
Author(s):  
Jānis Kajaks ◽  
Karlis Kalnins ◽  
Juris Matvejs
Keyword(s):  
Adhesive Strength ◽  
Coupling Agent ◽  
Bonding Strength ◽  
Considerable Increase ◽  
Adhesive Bonding ◽  
Water Resistance ◽  
Wood Plastic Composites ◽  
Maleated Polypropylene ◽  
Plastic Composites ◽  
Pp Composites

One type of birch plywood production by-product: plywood sanding dust (PSD) and virgin polypropylene (PP) composites adhesive activity was investigated. To improve of the WP (PP+40 wt.% PSD) composites sheets as overlay bonding strength against birch plywood surface and water resistance of these laminated systems the industrially produced WPC material was modified with maleated polypropylene wax (MAPP) additives. These studies showed possibility of the usage of presented by-product as an excellent reinforcement for PP based wood plastic composites and addition of the coupling agent (MAPP) gives the considerable increase of adhesive activity of the used WPC. Due to the presence of MAPP (up to 4%) significantly increases not only adhesive strength of the laminates but also water resistance of the laminated sandwich specimens. As the example adhesive bonding strength could reach 2,74 N/mm2 and increases up to 4 times to compare with unmodified WPC adhesives.

Polypropylene composites reinforced with hybrid inorganic fillers: Morphological, mechanical, and rheological properties

2018 ◽  
Vol 32 (6) ◽  
pp. 848-864 ◽  
Author(s):  
Prakhar Mittal ◽  
Shiva Naresh ◽  
Priyanka Luthra ◽  
Amardeep Singh ◽  
Jatinder Singh Dhaliwal ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Hybrid Composites ◽  
Flexural Modulus ◽  
Filler Particle ◽  
Tensile Modulus ◽  
Filler Loading ◽  
Polypropylene Composites ◽  
Filler Particle Size ◽  
Size Type ◽  
Mineral Fillers

Mineral fillers like talc and mica are commonly used in the plastic industry because of their tendency to alter the properties of thermoplastic materials. Polypropylene (PP)-talc (PTC), PP-mica (PMC), and PP-talc/mica hybrid composites (PHC) were prepared. Results indicated that filler particle size, type, and content greatly influence the mechanical and rheological properties of the composites. Shear viscosity decreased with the increase in shear rate. At 40°C, an increase of approximately 120% in storage modulus ( E′) was observed in PMC composites. C parameter increased, whereas reinforcing efficiency ( r) decreased with the increase in filler loading. Percent elongation of each type of composites decreased with the increase in filler loading. Tensile modulus of PTC composite increased significantly by 103% (571 MPa) at 20% loading of talc, whereas for PHC and PMC composites, increase of 93% (543 MPa) and 81% (511 MPa) was observed. Flexural modulus also increased considerably by 88% (2413 MPa), 80% (2313 MPa), and 62% (2084 MPa) of PTC, PHC, and PMC composites at 20% filler loading.

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