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Glass transition of hydrated wheat gliadin powders |
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| Authors: | Shao-min Sun Li Zhao Yi-hu Song Qiang Zheng |
| Institution: | Shao-min Sun(a,b,c),Li Zhao(a,b),Yi-hu Song(a,b**) and Qiang Zheng(a,b**) a Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027,China b Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education,Zhejiang University, Hangzhou 310027,China c Institute of Textiles and Clothing,The Hong Kong Polytechnic University,Kowloon,Hong Kong,China |
| Abstract: | Modulated-temperature differential scanning calorimetric and dynamic mechanical analyses and dielectric spectroscopy were used to investigate the glass transition of hydrated wheat gliadin powders with moisture absorption ranged from 2.30 db% to 18.21 db%. Glass transition temperature (T g) of dry wheat gliadin was estimated according to the Gordon-Taylor equation. Structural heterogeneity at high degrees of hydration was revealed in dielectric temperature and frequency spectra. The activation energies (E a) of the two relaxations were calculated from Arrhenius equation. |
| Keywords: | Hydrated gliadin Glass transition MDSC DMA Dielectric spectra |
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