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Polymers based on chemically modified starch
Horák, Pavel ; Kruliš, Zdeněk ; Šárka, E. ; Kobera, Libor
In our research, we are developing materials based on chemical modified wheat starch ant its derivatives. The starch is esterified with various acids or acid anhydrides, e.g. acetic or propionic acid. Main goal of this work is to determine the degree of substitution, which has significant relevance in study of modified saccharides. it was done using three different techniques - acid-base titration, elemental analysis and nuclear magnetic resonance spectroscopy.
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Wheat B-starch based polymeric materials
Kotek, Jiří ; Kruliš, Zdeněk ; Šárka, E.
The contribution is aimed at preparation of a thermoplastic material derived from the wheat B-starch. Two ways have been followed, namely blending of the starch with poly(ε-caprolactone) (PCL) and plasticizing of the starch. In both cases, properties of the materials based on the B-starch are comparable to analogous materials based on the A-starch. The prepared materials have potential application as biodegradable films for agriculture.
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