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Type: Artigo
Title: Curaua fiber reinforced high-density polyethylene composites: effect of impact modifier and fiber loading
Author: Morais, Jaqueline Albano de
Gadioli, Renan
Paoli, Marco-Aurelio De
Abstract: Short fibers are used in thermoplastic composites to increase their tensile and flexural resistance; however, it often decreases impact resistance. Composites with short vegetal fibers are not an exception to this behavior. The purpose of this work is to produce a vegetal fiber reinforced composite with improved tensile and impact resistance in relation to the polymer matrix. We used poly(ethylene-co-vinyl acetate), EVA, to recover the impact resistance of high density polyethylene, HDPE, reinforced with Curauá fibers, CF. Blends and composites were processed in a corotating twin screw extruder. The pure polymers, blends and composites were characterized by differential scanning calorimetry, thermogravimetry, infrared spectroscopy, scanning electron microscopy, tensile mechanical properties and Izod impact resistance. EVA used as impact modifier in the HDPE matrix exhibited a co-continuous phase and in the composites the fibers were homogeneously dispersed. The best combination of mechanical properties, tensile, flexural and impact, were obtained for the formulations of composites with 20 wt. % of CF and 20 to 40 wt. % of EVA. The composite prepared with 20 wt. % EVA and containing 30 wt. % of CF showed impact resistance comparable to pure HDPE and improved tensile and flexural mechanical properties
Subject: Fibras
Country: Brasil
Editor: Associação Brasileira de Polimeros
Rights: Aberto
Identifier DOI: 10.1590/0104-1428.2124
Date Issue: 2016
Appears in Collections:IQ - Artigos e Outros Documentos

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