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International Journal of Polymer Science
Volume 2015, Article ID 582901, 12 pages
Research Article

Controlling the Melt Resistance to Flow as a Possibility of Improving the Miscibility and the Time Behavior of Some Blends Based on Starch

1National Research and Development Institute for Chemistry and Petrochemistry, ICECHIM, 202 Splaiul Independentei, 060021 Bucharest, Romania
2Department of Bioresources and Polymer Science, University Politehnica of Bucharest, 1-7 Polizu, 011061 Bucharest, Romania
3METAV-CD S.A., 31 C.A., Rosetti, 020011 Bucharest, Romania
4Research Institute of Organic Auxiliary Products S.A., ICPAO, 8 Carpati, Medias, 551022 Sibiu, Romania

Received 28 August 2015; Revised 13 November 2015; Accepted 30 November 2015

Academic Editor: Shiv Shankar

Copyright © 2015 Doina Dimonie et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The paper proves that the miscibility of some blends based on starch can be improved by finding for each of them the melt resistance to flow at which the nonstationary flow and the melt degradation are avoided and the developed shear rate homogenizes optimally the material composition. The obtained results show that, for process sensitive materials like starches, the border between good and less miscibility is so narrow that the window of melt processing conditions and the best formulation must be found for each of them. The improving of miscibility by controlling the melt resistance to flow proves to be a good method to prevent retrogradation and plasticizer leaching and so to handle the new compounds behavior during usage.