Abstract
ABSTRACT Zein film cast from aqueous ethanol and methanol is amorphous in the random coil conformation. In the DSC measurement water in the specimen is lost by evaporation at about 100°C. The glass transition is observed at 165°C. The amorphous zein crystallize to β -crystals at about 210°C accompanied by the random-coil → β -form conformational transition. The thermal degradation of zein occurs at about 320°C. Steam treatment of zein film results in the conformational change to the α - and β -forms, simultaneously, irrespective of treating temperature.
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