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Thermal and mechanical properties of woodflour/tannin adhesive composites

✍ Scribed by M. Mosiewicki; M. I. Aranguren; J. Borrajo

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
197 KB
Volume
91
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Composite materials formulated with a natural polyphenolic matrix (commercial tannin adhesive made from quebracho tannin extract), pine woodflour as reinforcing material, and hexamethylenetetramine as hardener were prepared and tested. Scanning electron microscopy of fractured samples was used to analyze the efficiency of the wetting and adhesion of the filler to the surrounding matrix. Thermogravimetric analysis was used in the thermal characterization of the woodflour and the tannin extract. Flexural, compression, and dynamic‐mechanical tests were performed on composites to study the relationship of the filler content and particle size with the composite final properties. Moreover, the influence of the moisture content on the physical and mechanical properties of the different composites was analyzed. Results indicated that the mechanical properties were severely affected by the absorbed moisture. Β© 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 3074–3082, 2004

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