Densities and Viscosities of Poly(ethylene glycol) 4000 + Diammonium Hydrogen Phosphate + Water Systems

• Main Authors: I., Regupathi, Murugesan, Shreela, S P, Amerash, R., Govindarajan, T., Murugesan
• Format: Article
• Published: Americal Chemical Society 2009
• Subjects: TP Chemical technology
• Online Access: http://eprints.utp.edu.my/815/1/je800769c%3FcookieSet%3D1; http://eprints.utp.edu.my/815/
• Institution: Universiti Teknologi Petronas

The densities and viscosities of binary and ternary solutions of the poly(ethylene glycol) 4000 (PEG4000) + diammonium hydrogen phosphate + water system were determined at different temperatures [(298.15, 303.15, 308.15, 313.15, and 318.15) K]. The measured density and viscosity data of all the binary and ternary systems were fitted to available empirical correlations, for the corresponding temperatures. The density data show a linear variation with mass fraction of the polymer for all temperatures. The viscosity data of all the solutions were correlated as a function of their mass fraction, using a nonlinear equation, for the five different temperatures covered in the present work. Densities and viscosities of PEG4000-diammonium hydrogen phosphate two-phase systems have been measured at (298.15, 303.15, 308.15, 313.15, and 318.15) K. The tie line lengths (TLL) of the aqueous two-phase systems have also been estimated, and the effect of the physical properties on the TLL is also reported.