Thermally stimulated current and creep of solid amylose

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Abstract
Dielectric and viscoelastic properties of solid amylose were investigated by thermally stimulated current and creep techniques in order to clarify the relation between its structure and properties, and also the different binding modes of water molecules. Several current peaks were observed, and these were decomposed into elementary processes by the fractional polarization technique. A peak at about —110[ddot]C was attributed to the rotational motion around the C5-C6 axis of methylol groups attached to the C5 atom in the glucose residue. A peak at about — 50dGC was attributed to bound water: This peak was eliminated by drying the specimen. A peak at about —230[ddot]C was attributed to another kind of bound water. A peak at about 30[ddot]C was attributed to dehydration during the experiment. Thus, three different relaxation modes of bound water were separated by the present work.

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