Wood particle/high‐density polyethylene composites: Thermal sensitivity and nucleating ability of wood particles

Wiley - Tập 113 Số 1 - Trang 593-600 - 2009
Hassine Bouafif1, Ahmed Koubaa1, Patrick Perré2, Alain Cloutier3, Bernard Riedl3
1Chaire de Recherche du Canada sur la Valorisation, la Caractérisation et la Transformation du Bois, Université du Québec en Abitibi‐Témiscamingue, 445 BD de l'Université, Rouyn‐Noranda, Quebec, Canada J9X5E4
2AgroParisTech, 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, France 54000
3Centre de Recherche sur le Bois, Université Laval, Pavillon Gene‐H.‐Kruger, Québec, Quebec, Canada G1V 0A6

Tóm tắt

AbstractThe 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 half‐time, 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. J Appl Polym Sci, 2009

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Wiley

Tập 113 Số 1

593-600

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