Premium
Intrinsic Viscosity of Aqueous Solutions of Carboxymethyl Guar in the Presence and in the Absence of Salt
Author(s) -
Badiger Manohar V.,
Gupta Nivika R.,
Eckelt John,
Wolf Bernhard A.
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800238
Subject(s) - intrinsic viscosity , aqueous solution , dilution , chemistry , polyelectrolyte , viscosity , salt (chemistry) , polymer , molar mass , thermodynamics , polymer chemistry , reduced viscosity , analytical chemistry (journal) , chromatography , organic chemistry , physics
Intrinsic viscosities were determined for solutions of CMG in pure water and 0.9 wt.‐% aqueous NaCl. To avoid the 0/0‐type extrapolation typical for Huggins plots, a new procedure was used. For CMG and pure water, this requires only two adjustable parameters: the specific hydrodynamic volume of the polymer in the limit of infinite dilution and a hydrodynamic interaction parameter. The intrinsic viscosity of CMG (no salt) at room temperature is 6 050 mL · g −1 ; approximately half as large as that of Na‐PSS of comparable molar mass. The ratio of the intrinsic viscosities with and without salt is ≈7 for CMG, as compared to >100 for Na‐PSS. The reasons for the different behaviors of the two types of polyelectrolytes are being discussed.