𝔖 Bobbio Scriptorium
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Extruded Biodegradable Cast Films from Polyhydroxyalkanoate and Thermoplastic Starch Blends: Fabrication and Characterization

✍ Scribed by Yashodhan Parulekar; Amar K. Mohanty

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
344 KB
Volume
292
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

PHA‐based extruded films were developed by blending PHAs with thermoplastic starch using extensive process engineering based on structure‐property correlations. Starch was destructurized and plasticized followed by melt‐blending with PHA and PBAT. Dynamic mechanical analysis coupled with Gibbs free energy values indicated that the starch plastic was performing the role of a dual compatibilizer in between the PHA and the PBAT phases in the blend. Aging, an inherent problem with starch‐based materials and PHA‐based materials, was effectively reduced by limiting the moisture uptake of the starch component, hindering the leaching of glycerol and inhibiting the secondary crystallization of the PHA component in the films.

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