Title of article :
Thermoplastic starch/polyester films: Effects of extrusion process and poly (lactic acid) addition
Author/Authors :
Shirai، نويسنده , , Marianne Ayumi and Olivato، نويسنده , , Juliana Bonametti and Garcia، نويسنده , , Patrيcia Salomمo and Müller، نويسنده , , Carmen Maria Olivera and Grossmann، نويسنده , , Maria Victَria Eiras and Yamashita، نويسنده , , Fabio، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Abstract :
Biodegradable films were produced using the blown extrusion method from blends that contained cassava thermoplastic starch (TPS), poly(butylene adipate-co-terephthalate) (PBAT) and poly(lactic acid) (PLA) with two different extrusion processes. The choice of extrusion process did not have a significant effect on the mechanical properties, water vapor permeability (WVP) or viscoelasticity of the films, but the addition of PLA decreased the elongation, blow-up ratio (BUR) and opacity and increased the elastic modulus, tensile strength and viscoelastic parameters of the films. The films with 20% PLA exhibited a lower WVP due to the hydrophobic nature of this polymer. Morphological analyses revealed the incompatibility between the polymers used.
Keywords :
Biodegradable film , Viscoelasticity , Blown extrusion , water vapor permeability , mechanical properties
Journal title :
Materials Science and Engineering C
Journal title :
Materials Science and Engineering C
