期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 33, 期 7, 页码 4112-4117出版社
ELSEVIER
DOI: 10.1016/j.msec.2013.05.054
关键词
Biodegradable film; Viscoelasticity; Mechanical properties; Water vapor permeability; Blown extrusion
资金
- CAPES
- CNPq
- Fundacao Araucaria
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. (C) 2013 Elsevier B.V. All rights reserved.
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