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Slit die rheology of thermoplastic starch during extrusion process

  • Research Article
  • Published:
International Journal of Plastics Technology

Abstract

In this work, the rheological properties of thermoplastic starch (TPS) were determined using a laboratory scale single screw extruder at different temperatures (110, 130, and 140 °C) and speeds (10, 15, 20, 25, 30, and 35 RPM). Glycerol was used as a plasticizer for preparing TPS. Apparent shear rate (\( {{\mathop{\gamma}\limits^{\cdot}}_a} \)), apparent shear stress (τ a ), apparent shear viscosity (η a ) and flow activation energy at a constant shear rate (E γ ) were determined. The results showed that TPS melts were pseudo plastic (n < 1) and the shear viscosity decreases with increasing shear rate at different temperatures. Also it was found that that shear viscosity of TPS decreases with increasing glycerol content in TPS, according to the values of flow activation energy at a constant shear rate, TPS25 was more sensitive to processing temperature.

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Acknowledgement

The authors are grateful to Dr. Ahmed Flaah (Damascus University – Department of Chemistry) for his aid in completing this work.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Laboratory of Materials Rheology (LMR), University of Damascus, P. O. Box 31513, Damascus, Syria

    Mosab Kaseem & Fawaz Deri

  2. School of Materials Science and Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea

    Kotiba Hamad

Authors
  1. Mosab Kaseem
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  2. Kotiba Hamad
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  3. Fawaz Deri
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Correspondence to Mosab Kaseem.

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Kaseem, M., Hamad, K. & Deri, F. Slit die rheology of thermoplastic starch during extrusion process. Int J Plast Technol 17, 51–60 (2013). https://doi.org/10.1007/s12588-013-9044-x

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  • DOI: https://doi.org/10.1007/s12588-013-9044-x

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