Discontinuous and heterogeneous glass transition behavior of carbohydrate polymer-plasticizer systems

► Glass transition temperature (Tg) decreased with increasing plasticizer content. ► An abrupt depression of the Tg occurred at certain plasticizer content. ► The glass transition was much broader for intermediate plasticizer content. ► Two different glass transitions were observed in the broad glass transition. ► Carbohydrate polymer-plasticizer systems can be classified into three regions.