화학공학소재연구정보센터
Thermochimica Acta, Vol.513, No.1-2, 68-74, 2011
Partial molar volumes, expansibilities and compressibilities of glyglyglycine in aqueous sucrose and fructose solutions between 288.15 and 308.15 K
Apparent molar volumes (V-phi) and apparent molar adiabatic compressibilities (K-phi,K-s) of triglycine (glyglyglycine) in aqueous and mixed aqueous solutions of fructose and sucrose (2, 4, and 6 mass%) have been determined at 288.15, 293.15, 298.15, 303.15, and 308.15 K. From these data, limiting partial molar volumes (V-phi(0)) and limiting partial molar adiabatic compressibilities (K-phi,s(0)) for glyglyglycine in aqueous sucrose and fructose solutions have been evaluated, together with the standard partial molar properties of transfer Delta Y-tr of the glyglyglycine from water to aqueous saccharides solutions. Transfer parameters have been interpreted in terms of solute-cosolute interactions on the basis of a cosphere overlap model. Pair and triplet interaction coefficients have also been calculated from transfer parameter data. The partial molar volume at infinite dilution (V-phi(0)) were used to obtain the partial molar expansion at infinite dilution, E-2(0) for glyglyglycine to examine the temperature dependence of such interactions. (C) 2010 Elsevier B.V. All rights reserved.