TY - JOUR
T1 - Measurement and correlation of liquid-liquid equilibria for dextranpoly(ethylene glycol)water aqueous two-phase systems at 20°C
AU - Furuya, Takeshi
AU - Iwai, Yoshio
AU - Tanaka, Yoshiaki
AU - Uchida, Hirohisa
AU - Yamada, Sunao
AU - Arai, Yasuhiko
N1 - Funding Information:
We gratefully acknowledge the financial support provided by the Grant-in-Aid for Encouragement of Young Scientists (1993, 05 750 676), The Ministry of Education, Science and Culture, Japan. We also thank Mr. K. Nakada and Ms. J. Zhu for their support in this work.
PY - 1995/1/16
Y1 - 1995/1/16
N2 - The liquid-liquid equilibria (LLE) for the dextranpoly(ethylene glycol)water aqueous two-phase systems with various polymer molecular weights were measured at 20°C. The molecular weight distributions of dextran (DEX) and poly(ethylene glycol) (PEG) in the PEG-rich phase (top phase) and DEX-rich phase (bottom phase) were also measured. To take into account deviations from random mixing, the interaction term of the conventional Flory-Huggins equation was empirically modified. The molecular weight distribution of DEX was expressed by a Γ distribution function because the DEX sample used showed a wide molecular weight distribution though the PEG samples were almost monodispersed. LLE and molecular weight distributions were correlatet successfully using a continuous thermodynamic approach.
AB - The liquid-liquid equilibria (LLE) for the dextranpoly(ethylene glycol)water aqueous two-phase systems with various polymer molecular weights were measured at 20°C. The molecular weight distributions of dextran (DEX) and poly(ethylene glycol) (PEG) in the PEG-rich phase (top phase) and DEX-rich phase (bottom phase) were also measured. To take into account deviations from random mixing, the interaction term of the conventional Flory-Huggins equation was empirically modified. The molecular weight distribution of DEX was expressed by a Γ distribution function because the DEX sample used showed a wide molecular weight distribution though the PEG samples were almost monodispersed. LLE and molecular weight distributions were correlatet successfully using a continuous thermodynamic approach.
UR - http://www.scopus.com/inward/record.url?scp=0029219907&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029219907&partnerID=8YFLogxK
U2 - 10.1016/0378-3812(94)02572-I
DO - 10.1016/0378-3812(94)02572-I
M3 - Article
AN - SCOPUS:0029219907
SN - 0378-3812
VL - 103
SP - 119
EP - 141
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
IS - 1
ER -