Wood particle/high-density polyethylene composites: thermal sensitivity and nucleating ability of wood particles

被引：0
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作者：
Bouafif, Hassine [1 ]
Koubaa, Ahmed [1 ]
Perré, Patrick [2 ]
Cloutier, Alain [3 ]
Riedl, Bernard [3 ]
机构：
[1] La Caracterisation et la Transformation du Bois, Université du Québec en Abitibi-Témiscamingue, 445 BD de l'Université, Rouyn-Noranda, QC J9X5E4, Canada
[2] AgroParisTech, Institut National de la Recherche Agronomique, Unite Mixte de Recherche 1093, Laboratoire d'Etudes et de Recherche sur le Matériau Bois, 14 Rue Girardet, Nancy, 54000, France
[3] Centre de Recherche sur le Bois, Université Laval, Pavillon Gene-H.-Kruger, QC G1V 0A6, Canada
来源：
Journal of Applied Polymer Science | 2009年 / 113卷 / 01期
关键词：
The thermal sensitivity; nucleating ability; and nonisothermal crystallization of high-density polyethylene (HDPE) with different wood fillers during wood/HDPE melt processing were investigated with thermogravimetric analysis and differential scanning calorimetry. The results showed that the wood degraded at a lower temperature than HDPE. The thermal decomposition behavior was similar across wood species. The most remarkable dissimilarities were observed between wood and bark in the decomposition rate around a processing temperature of 300 C and in the peak temperature location for cellulose degradation. The higher degradation rate for bark was explained by the devolatilization of extractives and the degradation of lignin; which were present in higher amounts in pine bark. The nucleating ability for various wood fillers was evaluated with the crystalline weight fraction; crystal conversion; crystallization halftime; and crystallization temperature of the HDPE matrix. The nucleation activity improved with the addition of wood particles to the HDPE matrix. However; no effect of wood species on the crystal conversion was found. For composites based on semicrystalline matrix polymers; the crystal conversion may be an important factor in determining the stiffness and fracture behavior. © 2009 Wiley Periodicals; Inc;
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页码：593 / 600
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