Journal
CARBOHYDRATE POLYMERS
Volume 119, Issue -, Pages 78-84Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.11.030
Keywords
TPS; Isosorbide; Starch; Plasticization; Oxygen permeability; Mechanical properties
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Funding
- MANUNET ERA-Net Project called Bio-polymers
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Isosorbide is a non-toxic biodegradable diol derived from bio-based feedstock. It can be used for preparing thermoplastic starch through a semi-industrial process of extrusion. Isosorbide allows some technological advantages with respect to classical plasticizers: namely, direct mixing with starch, energy savings for the low processing temperature required and lower water uptake. Indeed, maize starch was directly mixed with the solid plasticizer and direct fed in the main hopper of a co-rotating twin screw extruder. Starch plasticization was assessed by X-ray diffraction (XRD) and dynamic-mechanical analysis (DMTA). Oxygen permeability, water uptake and mechanical properties were measured at different relative humidity (R.H.) values. These three properties turned out to be highly depending on the R.H. No retrogradation and changing of the material properties were occurred from XRD and DMTA after 9 months. (C) 2014 Elsevier Ltd. All rights reserved.
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