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Materials 2018, 11(5), 820; https://doi.org/10.3390/ma11050820

Effect of Babassu Natural Filler on PBAT/PHB Biodegradable Blends: An Investigation of Thermal, Mechanical, and Morphological Behavior

1
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung (IFAM), Wiener Straße 12, D-28359 Bremen, Germany
2
Faculty of Production Engineering, University of Bremen, Badgasteiner Straße 12, D-28359 Bremen, Germany
3
Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Av. Maracanã 229, Rio de Janeiro, RJ 20271-110, Brazil
4
Department of Materials Engineering, Federal University of Campina Grande, R. Aprígio Veloso 882, Campina Grande, PB 58249-140, Brazil
5
Department of Materials Engineering, Federal University of Paraíba, Cidade Universitária s/n, João Pessoa, PB 58051-085, Brazil
*
Author to whom correspondence should be addressed.
Received: 20 April 2018 / Revised: 11 May 2018 / Accepted: 14 May 2018 / Published: 16 May 2018
(This article belongs to the Special Issue Green Composites: Preparation, Properties, and Applications)
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Abstract

Blending of biodegradable polymers in combination with low-price organic fillers has proven to be a suitable approach to produce cost-effective composites in order to address pollution issues and develop products with superior mechanical properties. In the present research work PBAT/PHB/Babassu composites with 25, 50, and 75% of each polymer and 20% of Babassu were produced by melting extrusion. Their thermal, mechanical, and morphological behavior was investigated by differential scanning calorimetry (DSC), tensile testing, and scanning electron microscopy (SEM). Blending PBAT with PHB inhibited the crystallization of both polymers whereas adding Babassu did not significantly change their melting behaviour. Incorporation of Babassu reduced the tensile strength of its respective blends between 4.8 and 32.3%, and elongation at break between 26.0 and 66.3%. PBAT as highly ductile and low crystalline polymer may be seen as a crystallization tool control for PHB as well as a plasticizer to PBAT/PHB blends and PBAT/PHB/Babassu composites. As PBAT content increases: (i) elongation at break increases and (ii) surface fracture becomes more refined indicating the presence of more energy dissipation mechanisms. As PBAT/PHB/Babassu composites are biodegradable, environmental friendly, and cost effective, products based on these compounds have a great potential since their mechanical properties such as ductility, stiffness, and tensile strength are still suitable for several applications even at lower temperatures (−40 °C). View Full-Text
Keywords: PBAT/PHB/Babassu; cost-effective compounds; biodegradability; green composites; biomaterial; organic filler; mechanical characterization; differential scanning calorimetry; scanning electron microscopy PBAT/PHB/Babassu; cost-effective compounds; biodegradability; green composites; biomaterial; organic filler; mechanical characterization; differential scanning calorimetry; scanning electron microscopy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Beber, V.C.; de Barros, S.; Banea, M.D.; Brede, M.; de Carvalho, L.H.; Hoffmann, R.; Costa, A.R.M.; Bezerra, E.B.; Silva, I.D.S.; Haag, K.; Koschek, K.; Wellen, R.M.R. Effect of Babassu Natural Filler on PBAT/PHB Biodegradable Blends: An Investigation of Thermal, Mechanical, and Morphological Behavior. Materials 2018, 11, 820.

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