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Polymer Bulletin

, Volume 73, Issue 12, pp 3531–3545 | Cite as

Rheological, mechanical and morphological behavior of polylactide/nano-sized calcium carbonate composites

  • Janaina Fernandes Moreno de Almeida
  • Ana Lúcia Nazareth da SilvaEmail author
  • Viviane Alves Escócio
  • Antônio Henrique Monteiro da Fonseca Thomé da Silva
  • Ana Maria Furtado de Sousa
  • Christine Rabello Nascimento
  • Luiz Carlos Bertolino
Review

Abstract

Semicrystalline polylactide (PLA) is a promising material to replace petroleum-based plastics since it can be synthesized from renewable resources. PLA exhibits high tensile strength and modulus, but very low strain-at-break and toughness. In this study, the effects of the nano-sized calcium carbonate (nCaCO3) on the rheological, mechanical and morphological properties of polylactide are evaluated. The PLA/nCaCO3 composites with different filler compositions, as well as neat PLA (used as reference) were prepared by melt mixing in a twin-screw extruder. The results show that the presence of 7.0 wt% of nCaCO3 in the composite not only produced an ultimate strain improvement, but also better overall toughness balance in comparison to the other compositions. MEV micrographs showed the presence of microvoids with composition containing 7.0 wt% nCaCO3, which explains the mentioned mechanical behavior. This composition also showed more viscous behavior in relation to neat PLA and 5.0 wt% nCaCO3 composite. Composite with 3 wt% of nanofiller presented the highest viscous behavior in relation to neat PLA and other composites. Both mechanical data and Cole–Cole plots indicated the overall absence of higher filler aggregates in the composites analyzed, corroborating the MEV micrographs.

Keywords

Polylactide Nano-sized calcium carbonate Composite Rheology Mechanical properties 

Notes

Acknowledgments

We acknowledge financial support by CAPES. We are also grateful to NatureWorks and Nanomaterials Technology for supplying the PLA and nCaCO3, respectively.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Janaina Fernandes Moreno de Almeida
    • 1
  • Ana Lúcia Nazareth da Silva
    • 1
    Email author
  • Viviane Alves Escócio
    • 1
  • Antônio Henrique Monteiro da Fonseca Thomé da Silva
    • 2
  • Ana Maria Furtado de Sousa
    • 3
  • Christine Rabello Nascimento
    • 4
  • Luiz Carlos Bertolino
    • 5
  1. 1.Instituto de Macromoléculas Professora Eloisa Mano-IMA/UFRJRio de JaneiroBrazil
  2. 2.Escola de Engenharia-UFFNiteróiBrazil
  3. 3.Instituto de Química-IQ/UERJRio de JaneiroBrazil
  4. 4.Programa de Engenharia Metalúrgica-PEMM/COPPE/UFRJRio de JaneiroBrazil
  5. 5.Centro de Tecnologia Mineral-CETEMRio de JaneiroBrazil

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