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Thermoplastic starch/PVAl compounds: Preparation, processing, and properties

✍ Scribed by Zhiqiang Liu; Yi Feng; Xiao-Su Yi

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
323 KB
Volume
74
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

As a renewable and native polymeric material, thermoplastic starch is gaining increased acceptance because of resource and environment concerns. This study reports the formulation design of native starch/polyvinyl alcohol (PVAl) compounds; the preparation technology to make them available for thermoplastic processing; and their rheological, mechanical, and degradation properties. Among various plasticizers investigated, a mixture of glycerin and water (50/50 wt %) is found to be the best one for the compounds in terms of rheological behavior, mechanical properties, and environmental stability. The mechanical properties do not increase with the PVAl content to an expected extent, mainly due to the poor interface adhesion between the fibrous PVAl structure and the starch matrix.

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