Viscosity of concentrated sucrose and trehalose aqueous solutions including the supercooled regime

M.PAULA LONGINOTTI; HORACIO R. CORTI

JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA

Americna Institute of Physics

Lugar: Melville; Año: 2008 vol. 37 p. 1503 - 1515

0047-2689

The viscosity of aqueous solutions of sucrose and trehalose is analyzed over a wide range of concentrations and temperatures covering the normal liquid and supercooled regions, close to the glass transition temperature. The sugar solutions are fragil systems whose viscosity exhibits temperature dependence with a large departure from Arrhenius behavior. A description of the temperature and concentration dependences of the solution viscosity is given in terms of a scaled Arrhenius representation, which adopts the reduced temperature Tg/T as the state variable. A comparison with results obtained from other theorical or semiempirical equations is also presented.