Effect of the various coupling agents on the mechanical and physical properties of thermoplastic‐bagasse fiber composites

Youssef, Hamdy M.; Ismail, M. R.; Ali, Magdy A. M.; Zahran, A. H.

doi:10.1002/pc.20473

Cited by 19 publications

(20 citation statements)

References 35 publications

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“…Recently, studies have reported the use of sugarcane bagasse fibers as filler in thermoplastic composite. The majority of these works developed plastics with distinct mechanical properties .…”

Section: Introductionmentioning

confidence: 99%

Development of composites based on recycled polyethylene/sugarcane bagasse fibers

et al. 2013

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In this work, sugarcane bagasse fibers were used as filler in composites having recycled high‐density polyethylene (PEr) as matrix. Because of the poor interaction between fibers surface and the PEr, the surface of bagasse was chemically modified. This modification consists of washing with water at 80°C, a mercerization process using sodium hydroxide and acetylation reaction with acetic anhydride. The chemical modification was characterized by Fourier transform infrared–horizontal attenuated total reflectance (FTIR‐HATR) and 13C nuclear magnetic resonance spectroscopies (NMR), thermogravimetric analysis (TGA), and scanning electronic microscopy (SEM). The composites were prepared from modified and unmodified fibers into PEr matrix, containing 5, 10, and 20% (w/w) of fiber. The samples were processed by extrusion and molds were prepared by injection process in order to perform mechanical tests. These materials were analyzed by SEM, TGA, and the water uptake was evaluated. Also, their mechanical properties were analyzed. Morphological analysis indicated that the chemical modification of sugarcane bagasse increased the compatibility between matrix and reinforcement. Tensile, flexural, and impact tests showed that the mechanical properties of the composite were improved compared to PEr due to the presence of the fibers. POLYM. COMPOS., 35:768–774, 2014. © 2013 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Development of composites based on recycled polyethylene/sugarcane bagasse fibers

et al. 2013

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“…Maleic anhydride treated rubber wood fiber reinforced polyolefin composites was developed and characterized by Tasdemir et al [28]. Bagasse fiber treated with silane and dicumyl peroxide was found to improve compatibility with LDPE as reported by Yourself et al [29]. Diminished size of phase boundaries was observed for ionomer compatibilized wood/LDPE composites as observed by Sedlackova et al [30].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and thermal properties of compatibilized composites of LDPE and esterified unbleached wood pulp

Sailaja¹,

Deepthi²

2010

Polymer Composites

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Wood pulp has been esterified and blended with low density polyethylene (LDPE) along with LDPE grafted maleic anhydride as compatibilizer. The mechanical and thermal properties of the blends were measured and compared with neat LDPE. The mechanical properties improved due to the addition of compatibilizer. In all cases, an optimal compatibilizer content was observed. Scanning electron microscopy (SEM) revealed better adhesion between LDPE and treated wood pulp. SEM micrographs showed ductile fracture morphology for lower loadings of esterified wood pulp while for higher loadings, the specimen exhibited predominantly brittle fracture. Thermal analysis revealed that weight loss is higher for compatibilized composites. The obtained experimental results were analyzed using predictive theories which indicated better interaction between the LDPE and treated wood pulp. PO-LYM. POLYMER COMPOSITES--2011 FIG. 7. Plot of relative Young's modulus with volume fraction of woodph for (a) no compatibilizer; (b) 3% compatibilizer; (c) 6% compatibilizer; (d) 9% compatibilizer; (e) 12% compatibilizer; (f) 15% compatibilizer. POLYMER COMPOSITES--2011 205 FIG. 9. Plot of relative elongation at break with volume fraction of woodph for (a) no compatibilizer; (b) 3% compatibilizer; (c) 6% compatibilizer; (d) 9% compatibilizer; (e) 12% compatibilizer; (f) 15% compatibilizer.

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“…The increase of mechanical properties was due to improved adhesion between the fiber and matrix, which was confirmed by the increase of ∆E in stress relaxation tests. Previous literature also showed that a high compatibility at interfaces leads to better stress transfer between the two components and the improvement of mechanical and physical properties of the materials (Youssef et al 2008). It was conclusively demonstrated that the combination of PEG and heat treatment could alleviate the increasing stress relaxation rate and the decreasing strength caused by PEG impregnation, especially in the case of low-concentration PEG treatment.…”

Section: Discussionmentioning

confidence: 57%

Investigation of the Interfacial Compatibility of PEG and Thermally Modified Wood Flour/Polypropylene Composites Using the Stress Relaxation Approach

2013

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Stress relaxation has been proven to be a good measure for studying the interaction between the constituents in wood flour/polymer composites by evaluating the internal bonding quantitatively. In order to investigate the combination effect of polyethylene glycol (PEG) impregnation and heat treatment on the interfacial compatibility of wood flour/polypropylene composites, the stress relaxation of PEG and/or thermally modified wood flour/polypropylene composites was determined at three temperatures (26, 40, and 60 °C). The apparent activation energy (E) was also calculated according to Eyring's absolute rate reaction theory. The results showed that PEG treatment accelerated the stress relaxation rate of the composites and decreased the E. However, heat treatment resulted in an alleviation of the increasing rate of stress relaxation caused by PEG modification and an increase in the E of the composites. These results suggested that PEG treatment had a negative effect on the interfacial compatibility between wood flour and polypropylene in the composites, and heat treatment could compensate for this effect to a certain extent.

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Effect of the various coupling agents on the mechanical and physical properties of thermoplastic‐bagasse fiber composites

Cited by 19 publications

References 35 publications

Development of composites based on recycled polyethylene/sugarcane bagasse fibers

Development of composites based on recycled polyethylene/sugarcane bagasse fibers

Mechanical and thermal properties of compatibilized composites of LDPE and esterified unbleached wood pulp

Investigation of the Interfacial Compatibility of PEG and Thermally Modified Wood Flour/Polypropylene Composites Using the Stress Relaxation Approach

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