6. A Study of Glass-forming of Aqueous Alkylurea Solutions(Papers presented at the 41st Annual Meeting)

Abstract

Glass-forming composition regions of aqueous alkylurea (R=CH_3, C_2H_5) solutions were determined by a simple DTA method. Aqueous solutions of methylurea, 1,3-dimethylurea, 1,1-diethylurea show the normal Tg behavior with solute concentration, but those of tetrameth-ylurea and ethylurea show anormalous Tg behavior. It is concluded that the hydrophobic interaction plays an important role in the glass-forming of these solutions.