Effect of the Content of Organophilic Clays and Impact Modifier on the Mechanical Properties of Poly(lactic acid) PLA Biocomposites

Summary The aim of this work was to evaluate the effect of clay content and of an impact modifier on the properties of Poly(lactic acid) – PLA/clay biocomposites without and with EG terpolymer. The biocomposites were prepared by extrusion followed by injection molding and characterized by X‐Ray Diff...

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Bibliographic Details
Published in:Macromolecular symposia. 2016-09, Vol.367 (1), p.76-81
Main Authors: Cavalcanti, Shirley N., Alves, Amanda M., Agrawal, Pankaj, da Silva, Moacy P., Araújo, Aylanna P. M., Araújo, Edcleide M., Mélo, Tomás J. A.
Format: Article
Language:English
Subjects:
bentonite
biocomposites
biopolymers
Clay
Clays
Dispersion
Impact modifiers
Injection molding
Mechanical properties
PLA
Scanning electron microscopy
Terpolymers
vermiculite
X-ray diffraction
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Summary:Summary The aim of this work was to evaluate the effect of clay content and of an impact modifier on the properties of Poly(lactic acid) – PLA/clay biocomposites without and with EG terpolymer. The biocomposites were prepared by extrusion followed by injection molding and characterized by X‐Ray Diffraction (XRD) mechanical properties and Scanning Electron Microscopy (SEM). XRD results indicated a poor dispersion of the clay in the PLA/clay biocomposites regardless of the clay type and content. In the presence of EG terpolymer a better dispersion of the clay was obtained for the PLA/EG/OVT biocomposite. EG terpolymer proved to be a good impact modifier for PLA and the biocomposites, being the PLA/EG/OVT biocomposite the one that presented better impact strength. From the morphology analysis by SEM, plastic deformation on the fracture surface of the PLA/EG/OVT biocomposite was observed.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.201500165