Premium
Studies on the second virial coefficient of sodium alginate solution
Author(s) -
Zhang Hucheng,
Zheng Honghe,
Zhang Qinghi,
Gao Shuyan,
Wang Jianji
Publication year - 1997
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199711)8:11<722::aid-pat708>3.0.co;2-0
Subject(s) - polyelectrolyte , virial coefficient , osmometer , aqueous solution , osmotic coefficient , sodium , sodium polyacrylate , thermodynamics , sodium nitrate , osmotic pressure , solvent , polymer , polymer chemistry , materials science , chemistry , inorganic chemistry , activity coefficient , organic chemistry , physics , raw material , biochemistry
Based on the measurement of the concentration dependence of the osmotic pressure of sodium alginate aqueous solution in different concentrations of potassium nitrate, the contribution of polyion charges to the second virial coefficient was predicted. According to this analysis, an equation A 2 =A 2, O +A 2, D was obtained, and a method was introduced to determine the θ‐point of polyelectrolyte solution from A 2 determined by membrane osmometry. This is important in the investigation field of polymer solution theory and was proved to be correct if each polyelectrolyte molecule was ionized completely. The θ‐solvent of sodium alginate aqueous solution was measured to be the concentration in 1.41 molar potassium nitrate per litre at 30°C, and this experimental result indicated that Manning's polyelectrolyte solution theory model is fairly successful in explaining the colligative properties of polyelectrolyte solution. © 1997 John Wiley & Sons, Ltd.