Fiber reinforced plastic composites using recycled materials (original) (raw)
Related papers
2021
The mechanical and physical properties of fibre reinforced composite boards (FRCB) made from waste paper and recycled polyethylene was investigated. The composite boards were produced at three levels of mixing ratio (50:50, 60:40 and 70:30) and three levels of board density (1000 Kg/m3, 1100 Kg/m3 and 1200 Kg/m3). The fibre from the paper served as the reinforcement while the polyethylene served as the matrix or binder to form the composite board. The board produced was subjected to different standard tests to attain mechanical and physical properties such as modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swelling (TS). The mean values obtained for Thickness Swelling after 24 hours and 48 hours ranged from 0.02 ± 0.04 to 6.05 ± 3.21 and 3.06 ±1.27 to 12.59 ±0.05 respectively and that of water absorption after 24 hours and 48 hours ranged from 4.68 ± 0.25 to 15.78 ± 6.15 and 5.36 ± 0.16 to 18.37 ± 6.03 respectively. The mean value for MOR a...
Preparation and Properties of Wood Plastic Composites Made of Recycled High-density Polyethylene
Journal of Composite Materials, 2009
This article deals with experimental investigation of composites based on recycled high-density polyethylene (RHDPE) and poplar fibers (Populus deltoids) formed by air-forming and hot-pressing. The effects of the fiber content (55, 70, and 85 wt%) and compatibilizing agent (0, 2, and 4 wt%) concentration on the mechanical properties and water absorption were evaluated. The use of polyethylene-grafted maleic anhydride (PE-g-MA) improved the compatibility between the fiber and RHDPE. Adding PE-g-MA at 2 and 4 wt% in the composite formulation significantly improved both the stability and mechanical properties. The tensile strength of the composites containing PE-g-MA was superior to those of the composites without compatibilizing agent. As expected, the flexural of the composites increased with the wood content. Low internal bond strength was observed for the panels with different fiber loading and compatibilizing agent content in our study.
Composites Part B: Engineering, 2008
This paper investigated the stability, mechanical properties, and the microstructure of wood-plastic composites, which were made using either recycled or virgin high-density polyethylene (HDPE) with wood flour (Pinus radiata) as filler. The post-consumer HDPE was collected from plastics recycling plant and sawdust was obtained from a local sawmill. Composite panels were made from recycled HDPE through hot-press moulding exhibited excellent dimensional stability as compared to that made from virgin HDPE. The tensile and flexural properties of the composites based on recycled HDPE were equivalent to those based on virgin HDPE. Adding maleated polypropylene (MAPP) by 3-5 wt% in the composite formulation significantly improved both the stability and mechanical properties. Microstructure analysis of the fractured surfaces of MAPP modified composites confirmed improved interfacial bonding. Dimensional stability and strength properties of the composites can be improved by increasing the polymer content or by addition of coupling agent. This project has shown that the composites treated with coupling agents will be desirable as building materials due to their improved stability and strength properties.
Properties of eco-friendly composite from recycled polypropylene
2014
The recycled polypropylene (rPP)usually exhibits low mechanical property compared to virgin polypropylene. Microcrystalline cellulose (MCC) fiber may improve the mechanical property of rPP. The mechanical and water uptake properties of rPP composites filled with MCC was studied. Different composition of rPP composites (2,5,10,20 and 40wt%) and a constant MAPP coupling agent (3wt%) were prepared with injection molding after compounded in extruder machine. It was shown that the presence of MCC decreased the mechanical properties particularly at high content of MCC fiber, excluding the Young modulus. rPP composites with MAPP show higher mechanical properties. Water uptake property also exhibited a similar trend. Improvement in the interfacial adhesion between fiber-matrix is evident from FESEM analysis which supports the mechanical results.
Manufacturing of Wood-Plastic Composite from Completely Recycled Materials
Key Engineering Materials, 2011
In this study, wastes of wood cutting mills (wood flour) as well as wastes of textile industry (granules of polypropylene) were used in manufacturing wood-plastic composites. Hence, wood flour with weight percent of 30, 35 and 40 was mixed with corresponding amount of polypropylene and coupling agent, polypropylene grafted maleic anhydride in amount of 6 percent was used in whole compounds. Production was done by batch method and with employment of hot press and after preparation and cutting of specimens physical and mechanical properties of them was studied. The results showed that with increase of wood flour up to 35 percent, MOR, MOE, water absorption and thickness swelling increases but further than it mechanical and physical properties decreases. Besides, increase of wood flour up to 40 percent increased the hardness of the specimens.
Secondary Fiber / Recycled Polypropylene Composites
Secondary fiber reinforced recycled polypropylene composites have been developed. Post consumer used polypropylene, obtained from market, was processed to obtain recycled polypropylene. Secondary fiber has been obtained from post consumer used paper. Secondary fiber reinforced recycled polypropylene composites have been successfully processed by extrusion by using 2% maleic anhydride modified polypropylene that acts as an efficient compatibilizer and promotes interfacial adhesion between secondary fiber and recycled polypropylene. Samples and specimen have been processed by injection molding as per ASTM standards. Secondary fiber reinforced recycled polypropylene composites demonstrate higher tensile modulus as compared to matrix recycled polypropylene, and the tensile modulus of composites increases with increasing amounts of reinforcing fiber in composites. The tensile strength of the secondary fiber reinforced recycled polypropylene composites is higher as compared to matrix recy...
Chemical Engineering Journal, 2011
The use of coupling agents based on polyolefins is an interesting strategy for the preparation of composites with marked different chemical structure between their components. That is the case of polypropylenebased composites reinforced with lignocellulose fibers. In this work a deep study of the influence of the intrinsic parameters of maleated polypropylene (MAH-PP) has been carried out in order to determine the effect of its acid number as well as molecular weight in mechanical properties of composites reinforced with low cost reinforcements, under tensile, flexural and impact stresses, flow capacity, water absorption behavior and surface morphology. The use of high functionalized MAH-PP coupling leaded to important improvements in mechanical stresses and also a lower capacity of water absorption due to the formation of thinner interfaces. In the case high molecular weight MAH-PP agents, even higher than plain polymer matrix, conducted to an interesting increase in unnotched Charpy Impact Strength attributed to a low dispersion of the coupling agent in the matrix during mixing process keeping microdomains that help to avoid crack propagation.
Performance of polypropylene–wood fiber composites
Polymer Testing, 1999
Polypropylene–wood fiber composites were prepared in the optimal mixture conditions determined in a previous work (180°C, 60 rpm, 10 min). Tensile, impact and three-point bending tests were performed in order to evaluate the adhesion between matrix and wood fibers. Other than mixture conditions, drying temperature of treated wood fiber is also an important factor to obtain good performance composites as shown in this work. Tensile properties of composites submitted to two extreme conditions (immersion in water at ambient temperature for 90 days and immersion in boiling water for 1 h) were determined. Heat deflection temperature and thermal analysis of composites were evaluated.
Politeknik Dergisi
Various studies on the disposal or storage of the wastes generated due to mining activities have been carried out until today. With the developing technology, the use of alternative products instead of aggregates in Composite and the effect of fiber addition were investigated. The most common of these studies is the bending strength tests on the beam sample. In this study, solid wastes generated by mining operations were used instead of aggregate used in Composite. Beam samples were poured with the dimensions of 40×40×160 mm by adding 4-6 kg/m3 polypropylene fiber to the mixture obtained by using these solid wastes; then, its effects on ultrasonic pulse velocity test, tensile test, and compressive strength tests were conducted. According to the results of these tests, it was found that the fibers had a positive effect on compressive strength and bending strength. Also, it was found that water absorption rates and densities did not have an effect, while the ultrasonic pulse velocity ...