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  4. Effect of Babassu natural filler on PBAT/PHB biodegradable blends: An investigation of thermal, mechanical, and morphological behavior
 
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2018
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Titel

Effect of Babassu natural filler on PBAT/PHB biodegradable blends: An investigation of thermal, mechanical, and morphological behavior

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).
Author(s)
Beber, Vinicius C.
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Barros, Silvio de
Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Av. Maracanã 229, Rio de Janeiro, RJ 20271-110, Brazil
Banea, Mariana D.
Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Av. Maracanã 229, Rio de Janeiro, RJ 20271-110, Brazil
Brede, Markus
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Carvalho, Laura H. de
Department of Materials Engineering, Federal University of Campina Grande, R. Aprígio Veloso 882, Campina Grande, PB 58249-140, Brazil
Hoffmann, Ron
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Costa, Anna Raffaela M.
Department of Materials Engineering, Federal University of Campina Grande, R. Aprígio Veloso 882, Campina Grande, PB 58249-140, Brazil
Bezerra, Elieba B.
Department of Materials Engineering, Federal University of Campina Grande, R. Aprígio Veloso 882, Campina Grande, PB 58249-140, Brazil
Silva, Ingridy D.S.
Department of Materials Engineering, Federal University of Paraíba, Cidade Universitária s/n, João Pessoa, PB 58051-085, Brazil
Haag, Katharina
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Koschek, Katharina
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Wellen, Renate M.R.
Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung IFAM
Zeitschrift
Materials
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DOI
10.3390/ma11050820
Language
Englisch
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IFAM
Tags
  • PBAT / PHB / Babassu

  • cost-effective compou...

  • biodegradability

  • green composite

  • biomaterial

  • organic filler

  • mechanical characteri...

  • differential scanning...

  • scanning electron mic...

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