Evaluation of polypropylene/saw dust composites prepared with maleated polypropylene (mapp) produced by reactive extrusion

Trombetta, Ernani; Flores-Sahagun, Thais Helena Sydenstricker; Satyanarayana, K. G.

doi:10.1590/s1517-70762010000200032

Cited by 8 publications

(5 citation statements)

References 14 publications

(14 reference statements)

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“…As reported by Idrus et al, when the sawdust loading increases, the flexural strength gradually increases and this could be also due to the increase in resistance to shearing in the composites structure probably because of the presence of the sawdust [15]. is suggests that this material may have better dispersion of sawdust in the composite as [50]. e addition of sawdust has significantly increased the flexural strength of the composites due to its high modulus; higher fiber concentration demands higher stress for the same deformation and increased reinforcement-matrix adhesion provides increased stress transfer from the matrix to the reinforcement [22].…”

Section: Effect Of Sawdust Content On Flexural Strengthmentioning

confidence: 65%

Evaluation of Mechanical and Water Absorption Properties of Alkaline-Treated Sawdust-Reinforced Polypropylene Composite

Ferede

2020

Journal of Engineering

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Sawdust is a natural composite obtained from natural resources such as shrubs and trees and in a large amount from the wood industry as a waste. This study aimed to evaluate the mechanical and water absorption properties of alkaline-treated wood sawdust-reinforced polypropylene composite. The composites were manufactured by the melt-mixing method followed by compression molding with amounts of wood sawdust ranging from 10, 20, 30, and 40 to 50 wt. % by volume. The produced composites were characterized for their mechanical and water absorption characteristics. The results indicated that increasing the amount of wood sawdust content up to 40% improves the tensile, flexural, impact, and compressive strength of the composites but after the wood sawdust contents reach 40%, the mechanical properties of the composite were decreased. Water absorption rate has increased with an increase in the wood sawdust proportion; this is due to the presence of –OH groups on the surface of wood particles. From the result of this study, it can be also concluded that the optimal mechanical and water absorption properties were attained at 40% wood sawdust content. Therefore, sawdust can be used as filler and reinforcement in the PP matrix, which will reduce cost and give environmental benefits.

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Section: Effect Of Sawdust Content On Flexural Strengthmentioning

confidence: 65%

Evaluation of Mechanical and Water Absorption Properties of Alkaline-Treated Sawdust-Reinforced Polypropylene Composite

Ferede

2020

Journal of Engineering

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“…From FTIR graphs [Fig. 2(a)], characteristics band of stretching of CO in the zone of 1700–1850 cm −1 is observed from MA and characteristic band of stretching of OH in the zone of 3200–3550 cm −1 is also observed from absorbed moisture by the MA groups 12, 13. These peaks confirm the presence of MA in the structure.…”

Section: Resultsmentioning

confidence: 67%

Thermal and mechanical properties of polypropylene nanocomposite materials reinforced with cellulose nano whiskers

Bahar

Uçar

Önen

et al. 2012

J of Applied Polymer Sci

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We use polypropylene (PP, an apolar polymer) and cellulose nano whiskers (CNW, a polar material) to produce nano polymer composites with enhanced mechanical and thermal properties. To improve compatibility, maleic anhydride grafted PP has also been used as a coupling agent. To enhance the uniform distribution of CNW in the composite, the matrix polymer is dissolved in toluene, and sonification and magnetic stirring are applied. Good film transparency indicates uniform CNW dispersion, but CNW domains in the composite film observed under an scanning electron microscope may indicate slight agglomeration of CNW in the composite film. The tensile strength of the composite compared with neat PP improves by 70-80% with the addition of CNW. The crystallinity has also been improved by about 50% in the CNW reinforced samples. As the content of CNW increases, the composite exhibits higher thermal degradation temperature, higher hydrophilicity, and higher thermal conductivity.

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“…20 On the other hand, peaks at 1455 cm −1 and 1373 cm −1 represent asymmetric vibrations of H atoms of CH 2 and symmetric vibration of H atoms of CH 2 of the ethyl functional group, respectively. 21…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties of PP/kenaf core nanocomposites made from nanocrystalline cellulose as an additive

Sabaruddin

Tahir

Lee

2018

Journal of Reinforced Plastics and Composites

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Kenaf core contains a fairly high amount of cellulose and lignin; hence, any attempt to use both components would be beneficial. In this study, kenaf core was used as reinforcement in PP/kenaf core nanocomposites. The core was prepared in two forms: (i) as micron-size reinforcement and (ii) as nanocrystalline cellulose. The bleaching process for nanocrystalline cellulose was conducted at different intensities in order to retain different amounts of lignin in the pulp. Then, the nanocrystalline cellulose was prepared via hydrolysis reaction. Both the micron-size kenaf core pulp and the nanocrystalline cellulose of different bleaching intensity were loaded in the polypropylene matrix with the aid of maleic anhydride grafted polypropylene coupling agent. The mixtures were then hot pressed at 180°C for 8 min to form into standard testing size sample according to standard ASTM D638 (dumbbell shape for tensile test) and D790 (for flexural and impact test). The chemical, mechanical and morphological properties of the composites were evaluated. The results revealed that composites added with unbleached nanocrystalline cellulose (11.48% lignin content) had lowered the tensile and flexural strength. On the contrary, the impact strength was increased when unbleached nanocrystalline cellulose was added.

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Evaluation of polypropylene/saw dust composites prepared with maleated polypropylene (mapp) produced by reactive extrusion

Cited by 8 publications

References 14 publications

Evaluation of Mechanical and Water Absorption Properties of Alkaline-Treated Sawdust-Reinforced Polypropylene Composite

Evaluation of Mechanical and Water Absorption Properties of Alkaline-Treated Sawdust-Reinforced Polypropylene Composite

Thermal and mechanical properties of polypropylene nanocomposite materials reinforced with cellulose nano whiskers

Mechanical properties of PP/kenaf core nanocomposites made from nanocrystalline cellulose as an additive

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