The influence of wood flour particle size and content on the rheological,physical, mechanical and morphological properties of EVA/wood cellular composites |
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Affiliation: | 1. Department of Microbiology and Parasitology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil;2. Laboratory of Nanotechnology, Centro Universitário Franciscano, Santa Maria, RS, Brazil;3. Department of Biochemistry, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil;4. Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, SC, Brazil;5. Department of Physiology and Pharmacology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil;6. Laboratory of Microbiology, Centro Universitário Franciscano, Santa Maria, RS, Brazil;7. Section of Veterinary Pathology, Instituto Federal Catarinense, Concórdia, SC, Brazil |
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Abstract: | Cellular composites reinforced with vegetal fibers are an emerging class of materials combining good mechanical properties with reduced density and superior impact energy absorption, as well as thermal and acoustic isolation compared to other composites. This research aims to investigate the effects of different particle sizes and contents of wood flour (WF) on the properties of cellular poly(ethylene-co-vinyl acetate) (EVA)/WF composites. The cellular composites were foamed in a heat press using azodicarbonamide as blowing agent. The results indicate that decreasing the particle size of WF increases the viscosity of the composite, which restricts the expandability of the composite. The presence of WF in the cellular composite increases the nucleation of cells, providing a larger number of smaller cells with increased filler content. Optimal homogeneity was observed with WF B (100–150 mesh), but the highest mechanical properties of tear strength were observed with WF C (150–270 mesh). |
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Keywords: | Cellular composite Poly(ethylene-co-vinyl acetate) Wood flour Particle size |
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