Calorimetric, mechanical, and thermomechanical properties have been measured on starch films with various glycerol/water contents. For calorimetric measurements, a continuous decrease in T g was observed as glycerol increases from 0 to 25%. Mechanical properties exhibit a minimum of elongation at break for glycerol content Ç 12%. In slightly hydrated starch films not containing another plasticizer, a b relaxation is detected by DMTA around 068ЊC. This relaxation is modified by the presence of glycerol, the a relaxation of which appears in the same temperature range. Results are discussed comparing with the well-known antiplasticization effect in synthetic polymers such as PVC and PC. The combination of the plasticizer a mode and the polymer b mode is considered.
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