Effects of nano-clay particles and oxidized polypropylene polymers on improvement of the practical properties of wood-polypropylene composite

In this article, effects of nano-clay particles and compatibilization effect of the molten phase oxidized polypropylene were studied on the composites produced by wood fibers, polypropylene polymer, and nano-clay particles. To produce samples, wood fibers, and polypropylene polymer were mixed in an extruder in presence of 0, 2, and 4% nano-clay particles and 3% oxidized polypropylene (OPP), and then these samples were hot pressed in specific dimensions. Then the mechanical and physical properties, such as flexural strength, tensile strength, impact strength, and water absorption values were evaluated according to the ASTM Standards. The results showed that increment in amount of nano-clay particles and also, the usage of oxidized polypropylene, improved mechanical and physical properties of the composites. However, the impact strength and water absorption values were reduced. Also, X-ray diffraction analysis and electron microscopes images showed that the distribution of nano-clay particles in the matrix of polymer has intercalation structure.

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