CHANGES IN RHEOLOGICAL PROPERTIES OF GLIADIN AS A FUNCTION OF TEMPERATURE AND MOISTURE - DEVELOPMENT OF A STATE DIAGRAM

Rheological properties and thermal properties are used to characterize the physical states of gliadin In this research the temperature and f requency dependence of storage (G) and loss (G'') moduli were obtained for gliadin with 15-40% moisture. Gliadin showed a networking reactio n in the temperature range of 70-115-degrees-C for the examined moistu re content Below this temperature it behaved like an entangled fluid. Gliadin showed a maximum cross-linking density at 100-degrees-C calcul ated using G' and density data. As the temperature exceeded 135-degree s-C, the aggregated gliadin softened. A preliminary state diagram of g liadin as a function of temperature and moisture content was developed .