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International Journal of Polymer Science
Volume 2015, Article ID 627268, 9 pages
Research Article

Obtaining a Flexible Film Elaborated from Cassava Thermoplastic Starch and Polylactic Acid

1Grupo de Investigación Ciencia y Tecnología de Biomoléculas de Interés Agroindustrial, (CYTBIA), Popayán, Colombia
2Departamento de Agroindustria, Universidad del Cauca, Popayán, Colombia

Received 8 May 2015; Revised 18 July 2015; Accepted 21 July 2015

Academic Editor: Mukund Adsul

Copyright © 2015 Germán A. Arboleda et al. 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.


A flexible film was obtained from a blend of cassava thermoplastic starch and polylactic acid, using maleic anhydride as coupling agent. For this, an experimental design with three factors was used: polylactic acid content, coupling agent content, and temperature profile of the blown extrusion. It was found that the three factors generated significant differences on the response variables of tensile mechanical properties individually as in their triple interaction. Differential scanning calorimetry (DSC) was used by understanding the behavior of thermal properties of TPS/PLA blends with and without coupling agent, finding similar results between both. From this, the combination with 28% polylactic acid, 0.87% coupling agent, and 155.75°C temperature profile permitted the obtaining of a material with outstanding mechanical properties and offered advantages from the economic point of view.