The Effect of Wood Acetylation on Thermal Behavior of Wood-Polystyrene Composites

Lisperguer, Justo; Droguett, Cynthia; Ruf, Beatriz; Nuñez, Mario

doi:10.4067/s0717-97072007000100004

Cited by 16 publications

(19 citation statements)

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“…They reported that the dimensional stability and mechanical properties of composites containing treated fibers are superior to those of composites without treated fibers. Furthermore, Lisperguer et al (2007) studied the effect of the acetylation of wood on the thermal behavior of composites based on wood and polystyrene. Flores et al (2014) reported the physical and mechanical properties of composites formed by polystyrene/white oak, finding that the melt fluid index and water absorption strongly depended on the wood particle concentration.…”

Section: Introductionmentioning

confidence: 99%

Studies on Mechanical Performance of Wood-Plastic Composites: Polystyrene-Eucalyptus globulus Labill

et al. 2017

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The effects of size and concentration of wood particles on the properties of composites, obtained by extrusion, were evaluated based on polystyrene and wood particles from Eucalyptus globulus Labill. Woodplastic ratios were 10:90, 30:70, and 50:50 (weight / weight), and wood particles were retained in 40, 50, 65, and 100-mesh sieves. The density, flow index, water absorption, and the mechanical properties were evaluated. Scanning electron microscopy revealed poor adhesion between the wood particles and the polystyrene. The size and content of wood particles were found to have a strong influence on the mechanical properties of the composite. The introduction of the wood particles induced a reduction of the Young's modulus, ultimate strength and deflection, as well as an increment in the elongation at break. The impact resistance also increased with the size and concentration of the wood particles. Furthermore, with increasing content of wood particles, the value of the melt flow index decreased and the water absorption rose. .

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Section: Introductionmentioning

confidence: 99%

Studies on Mechanical Performance of Wood-Plastic Composites: Polystyrene-Eucalyptus globulus Labill

et al. 2017

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“…Some authors claim that acetylation improves the mechanical and thermal properties of WPCs (Tserki et al 2006;Lisperguer et al 2007;Abdul Khalil et al 2007;Özmen et al 2013). In contradiction to these studies, it was also reported that acetylation reduces the mechanical properties of WPCs (Luz et al 2008;Mat Taib et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…The processing temperatures for most of the natural fibers are thus limited to about 200°C, although within the normal range of processing temperature (180 to 200°C), significant extents of decomposition are realized (Sanadi et al 1996;Mohanty et al 2000). It was reported that the use of acetylated wood flour in polystyrene matrix resulted in better thermal stability than a non-acetylated control sample (Lisperguer et al 2007). It was also reported in our earlier study that a 19 wt% gain level of acetylation with vinyl acetate shifted the active decomposition temperature from 310°C to 370°C for wood flour in HDPE matrix (Özmen et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…There are studies that focus on acetic anhydride-modified fiber reinforced polymer composites (Tserki et al 2006;Lisperguer et al 2007;Abdul Khalil et al 2007;Luz et al 2008;Mat Taib et al 2010). Some authors claim that acetylation improves the mechanical and thermal properties of WPCs (Tserki et al 2006;Lisperguer et al 2007;Abdul Khalil et al 2007;Özmen et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Vinyl Acetate Modified Scots Pine Reinforced HDPE Composites: Influence of Various Levels of Modification on Mechanical and Thermal Properties

Özmen¹,

Çetin²,

Mengeloğlu³

et al. 2013

BioResources

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In order to compare the effect of vinyl acetate modification (VA) at different levels of weight percentage gain, Scots pine wood flour was modified with VA to three different wt% gains (10%, 16%, and 21% WPGs). Acetic anhydride (AA) modification at 24% WPG was also studied. Modified Scots pine wood flour reinforced HDPE composites (WPCs) were produced at 30 wt% wood flour loading by using extrusioninjection molding process and the mechanical properties of WPCs were determined. The thermal and morphological properties of WPG were characterised by using TGA and SEM techniques. The increase in tensile strength was significant for VA modified WPCs in comparison to the AA modified, unmodified or neat HDPE composites. Thermal stability was also significantly improved with increasing the WPG levels of VA modification.

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“…2,3 Today, research in this field has become increasingly important in helping manufacturers to tailor competitive wood products for a wider range of applications. [4][5][6][7][8][9][10][11][12][13][14][15][16] Two aspects must be considered: composite processing, since factors such as degradation and residence time are important parameters that influence properties, [17][18][19][20][21] and compatibility between the materials' phases. 7 Wood plastic composites (WPC) have limited applications due to the intrinsic properties of wood, such as its hydrophilicity and the relatively low dimensional stability of lignocellulosic components.…”

Section: Introductionmentioning

confidence: 99%

Optimization of wood flour acetylation by factorial design and partial least squares regression

Nadal¹,

Cararo²,

Pinheiro³

et al. 2012

Quím. Nova

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Recebido em 5/1/12; aceito em 17/5/12; publicado na web em 24/8/12Acetylation was performed to reduce the polarity of wood and increase its compatibility with polymer matrices for the production of composites. These reactions were performed first as a function of acetic acid and anhydride concentration in a mixture catalyzed by sulfuric acid. A concentration of 50%/50% (v/v) of acetic acid and anhydride was found to produced the highest conversion rate between the functional groups. After these reactions, the kinetics were investigated by varying times and temperatures using a 3 2 factorial design, and showed time was the most relevant parameter in determining the conversion of hydroxyl into carbonyl groups.

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The Effect of Wood Acetylation on Thermal Behavior of Wood-Polystyrene Composites

Cited by 16 publications

References 0 publications

Studies on Mechanical Performance of Wood-Plastic Composites: Polystyrene-Eucalyptus globulus Labill

Studies on Mechanical Performance of Wood-Plastic Composites: Polystyrene-Eucalyptus globulus Labill

Vinyl Acetate Modified Scots Pine Reinforced HDPE Composites: Influence of Various Levels of Modification on Mechanical and Thermal Properties

Optimization of wood flour acetylation by factorial design and partial least squares regression

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