Use of Sawdust in Polyethylene Composites

Hillig, Éverton; Freire, Estevão; Zattera, Ademir J.; Zanoto, G.; Grison, Karine; Zeni, Mára

doi:10.1177/147776060802400202

Cited by 15 publications

(16 citation statements)

References 4 publications

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“…Furthermore, the poor interfacial bonding between the hydrophilic filler and hydrophobic matrix also led to decreased flexural strength. 19,21,22 The Izod impact strength of the composites decreased as the filler content increased, as can be seen in Table 2. The introduction of reinforcements will introduce weak interfacial regions and the concentration of stress at the fiber ends, thereby decreasing the impact strength.…”

Section: Effect Of Wood Fiber Loadingmentioning

confidence: 83%

Effects of wood flour addition and coupling agent content on mechanical properties of recycled polystyrene/wood flour composites

Poletto

Zeni

Zattera

2011

Journal of Thermoplastic Composite Materials

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The effect of filler addition and coupling agent content on the mechanical properties and morphology of wood plastic composites was examined. Using wood flour as the reinforcement filler and recycled expanded polystyrene as the thermoplastic matrix polymer, a particle-reinforced composite was prepared using a co-rotating twin-screw extruder. In the sample preparation, four levels of filler loading (10, 20, 30, and 40 wt%) and three levels of coupling agent content (1, 2, and 4 wt%) were used. The influence of particle size and particle morphology was also evaluated. The results showed that short fibers provide a higher specific surface area, enlarging the contact surface area with the polymer matrix. A wood flour loading of more than 20 wt% caused a decrease in the mechanical properties studied. The addition of 2 wt% of coupling agent improved the interfacial adhesion between the polymer matrix and wood flour and increased the flexural and impact strengths of the lignocellulosic composites. Addition of a coupling agent content greater than 2 wt% caused a reduction in the mechanical properties evaluated. A morphological study revealed that the positive effect of coupling agent on the interfacial adhesion of wood flour reinforced the expanded polystyrene composites.

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Section: Effect Of Wood Fiber Loadingmentioning

confidence: 83%

Effects of wood flour addition and coupling agent content on mechanical properties of recycled polystyrene/wood flour composites

Poletto

Zeni

Zattera

2011

Journal of Thermoplastic Composite Materials

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“…The utilization of recycled plastic for the manufacture of thermoplastic composites has been studied by several authors 5–10. These composites are more cost effective than other similar materials.…”

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical analysis of recycled polystyrene composites reinforced with wood flour

Poletto

Zeni

Zattera

2011

J of Applied Polymer Sci

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The dynamic mechanical properties of wood flour (WF) reinforced recycled expanded polystyrene (r-EPS) composites were investigated as a function of the WF content and coupling agent used. With the incorporation of WF into the polystyrene the storage modulus (E 0 ) and loss modulus (E 00 ) were found to increase and the mechanical damping (tan d) decreased. The use of coupling agents improved the storage modulus and reduced the damping peak values of the composites because of the improved WF/matrix interfacial adhesion. The height of the damping peaks was found to be dependent on the content of maleic anhydride groups and the weight average molecular weight (M w ) of the coupling agent used. Finally, the experimental results were compared with the theoretical predictions for tan d and the storage modulus.

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“…The use of plant biomass materials, such as wood chips and sawdust, to reinforce thermoplastic polymers has gradually increased in recent years 1,2 . These materials are biodegradable, are obtained from renewable sources, and have low density and high mechanical properties compared to glass fiber 1,2 .…”

Section: Introductionmentioning

confidence: 99%

“…These materials are biodegradable, are obtained from renewable sources, and have low density and high mechanical properties compared to glass fiber 1,2 . However, they present limitations, such as low thermal stability and absorption of humidity 3 .…”

Section: Introductionmentioning

confidence: 99%

Materials produced from plant biomass: Part I: evaluation of thermal stability and pyrolysis of wood

et al. 2010

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This paper compares the thermal stability of the sawdust of different wood species, an important factor in producing reinforced polymers. The compositions of two wood species, Pinus taeda and Eucalyptus grandis, were determined to evaluate the influence of the main wood components on the thermal stability of this material. The two species were submitted to thermogravimetric analysis at different heating rates to calculate the activation energy (E a ) using the Flynn-Wall-Ozawa (FWO) and Kissinger methods. The results suggest that larger quantities of holocellulose and lignin associated with lower extractive contents give the wood greater thermal stability. The E a values calculated for the two species were in the range of 146-165 kJ.mol -1. Evaluation of the activation energy values offers a simplified means to better understand the thermal decomposition of the sawdust of different wood species used in developing composites.

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Use of Sawdust in Polyethylene Composites

Cited by 15 publications

References 4 publications

Effects of wood flour addition and coupling agent content on mechanical properties of recycled polystyrene/wood flour composites

Effects of wood flour addition and coupling agent content on mechanical properties of recycled polystyrene/wood flour composites

Dynamic mechanical analysis of recycled polystyrene composites reinforced with wood flour

Materials produced from plant biomass: Part I: evaluation of thermal stability and pyrolysis of wood

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