Effect of a Novel Coupling Agent, Polybutadiene Isocyanate, on Mechanical Properties of Wood-Fiber Polypropylene Composites

Nourbakhsh, Amir; Kokta, B. V.; Ashori, Alireza; Jahan-Latibari, Ahmad

doi:10.1177/0731684407087377

Cited by 52 publications

(51 citation statements)

References 23 publications

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“…The composite with 3% EP-g-Ma (Figure 10(d)) exhibited fibre pullout, but the fibres were still covered by residual amount of matrix. This indicated improved interfacial adhesion between oat hull fibre and matrix [23]. These results are in good agreement with the tensile and flexural properties of the composites.…”

Section: Heat Deflection Temperaturesupporting

confidence: 79%

Injection Moulded Biocomposites from Oat Hull and Polypropylene/Polylactide Blend: Fabrication and Performance Evaluation

Reddy

Misra

Mohanty

2013

Advances in Mechanical Engineering

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Oat hull fibre reinforced polypropylene-(PP-)/polylactide-(PLA-) based biocomposites were fabricated and their process engineering and performances were evaluated. The effect of ethylene propylene-g-maleic anhydride (EP-g-Ma) compatibilizer on mechanical properties of 30 wt% oat hull reinforced PP/PLA (90/10) blend composites was investigated. Thermal degradation parameters of the oat hull fibre were determined using thermogravimetric analysis. The effect of fibre reinforcement on crystallinity of oat hull fibre reinforced PP/PLA composites was studied by differential scanning calorimetry (DSC). Thermomechanical properties of the composites were analyzed by dynamic mechanical analyzer (DMA). The interfacial bonding between the fibre and the matrix was examined using scanning electron microscope (SEM). Significant improvement in tensile strength (40%) and flexural strength (46%) was observed with the addition of EP-g-Ma compatibilizer. DSC analysis of oat hull fibre reinforced composites showed an increase in the crystallization temperature (T ) due to the nucleation effect of oat hull fibre. DMA results revealed that the storage modulus of PP/PLA/Oat hull fibre composites was higher compared to PP/PLA blend throughout the investigated range of temperature.

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Section: Heat Deflection Temperaturesupporting

confidence: 79%

Injection Moulded Biocomposites from Oat Hull and Polypropylene/Polylactide Blend: Fabrication and Performance Evaluation

Reddy

Misra

Mohanty

2013

Advances in Mechanical Engineering

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“…For high impact properties, in fact, a slightly weaker adhesion between fiber and polymer is desirable, as it would result in a higher degradation of impact energy, supporting the socalled fiber pull-out. 29,30 It should be noted that for specific applications, the impact strength can be increased by using impact modifiers or by using natural fibers having higher microfibril angle. [31][32][33][34][35] Water absorption Figure 5 shows the values of the water absorption for the composites, which vary depending upon the nanoclay loading.…”

Section: Tensile Propertiesmentioning

confidence: 99%

Influence of nanoclay and coupling agent on the physical and mechanical properties of polypropylene/bagasse nanocomposite

Nourbakhsh

Ashori

2009

J of Applied Polymer Sci

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In this work, the effects of nanoclay (1-4 wt %) and coupling agent (2 and 4 wt %) loading on the physical and mechanical properties of nanocomposites are investigated. Composites based on polypropylene (PP), bagasse flour, and nanoclay (montmorillonite type) was made by melt compounding and then compression molding. When 1-3 wt % nanoclay was added, the tensile properties increased significantly, but then decreased slightly as the nanoclay content increased to 4%. The impact strength was 6% lower by the addition of 1 wt % nanoclay, it was decreased further when the nanoclay content increased from 1 to 4%. Finally, the water absorption of PP/bagasse composites was lowered with the increase in nanoclay content. Additionally, the coupling agent, 4 wt % MAPP, improved the mechanical and physical properties of the composites more than the 2 wt % MAPP. From these results, we can conclude that addition of nanoclay enables to achieve better physical and mechanical properties in conventional composites.

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“…Since the fiber-matrix interface between the hydrophilic wood fiber and hydrophobic polyolefin plays a key role in transferring stress between the two components, the incompatibility of polar wood fiber and non-polar polyolefin leads to difficulties in obtaining uniform dispersion of wood fibers in the matrix, which in turn reduces the efficiency with which the fibers reinforce the polymer; many efforts are being made to improve the compatibility between them [8][9][10][11][12][13][14]. One effective method is applying a coupling agent to the system [8][9][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Coupling Agent Concentration, Fiber Content, and Size on Mechanical Properties of Wood/HDPE Composites

2012

International Journal of Polymeric Materials

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In this study, the influence of coupling agent concentration (0 and 3 wt%), wood fiber content (50, 60, 70, and 80 wt%), and size (40-60, 80-100, and 160-180 mesh) on the mechanical properties of wood=high-density-polyethylene (HDPE) composites (WPCs) was investigated. WPC samples were prepared with poplar wood-flour, HDPE, and polyethylene maleic anhydride copolymer (MAPE) as coupling agent. It was found that the tensile properties and the flexural properties of the composites were improved by the addition of 3 wt% MAPE, and the improved interfacial adhesion was well confirmed by SEM micrographs. It was also observed that the best mechanical properties of wood= HDPE composites can be reached with larger particle size in the range studied, while too-small particle size was adverse for the mechanical properties of wood=HDPE composites. Moreover, the tensile modulus, tensile strength, and flexural strength of WPCs decreased with the increase in fiber content from 50 to 80 wt%; the flexural modulus of WPCs increased with the increase in fiber content from 50 to 70 wt% and then decreased as the fiber content reached 80 wt%. The variances in property performance are helpful for the end-user to choose an appropriate coupling agent (MAPE) concentration, wood fiber content, and particle size based on performance needs and cost considerations.

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Effect of a Novel Coupling Agent, Polybutadiene Isocyanate, on Mechanical Properties of Wood-Fiber Polypropylene Composites

Cited by 52 publications

References 23 publications

Injection Moulded Biocomposites from Oat Hull and Polypropylene/Polylactide Blend: Fabrication and Performance Evaluation

Injection Moulded Biocomposites from Oat Hull and Polypropylene/Polylactide Blend: Fabrication and Performance Evaluation

Influence of nanoclay and coupling agent on the physical and mechanical properties of polypropylene/bagasse nanocomposite

Effect of Coupling Agent Concentration, Fiber Content, and Size on Mechanical Properties of Wood/HDPE Composites

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