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Test of the des Cloiseaux Law by Membrane Osmometry on Pullulan
Author(s) -
Ayyad Ahmed Hassan
Publication year - 2001
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20010501)22:8<652::aid-marc652>3.0.co;2-#
Subject(s) - pullulan , osmometer , polymer science , membrane , chemistry , chromatography , polymer chemistry , organic chemistry , biochemistry , polysaccharide
The des Cloiseaux law Π ∼ C 9/4 describing the scaling relation between osmotic pressure and concentration in semi‐dilute solutions of neutral polymers in athermal solvent (good solvent) was tested on pullulan, which is a linear polysaccharide, using membrane osmometry. The experimentally determined exponent is 2.2865 ± 0.026, which agrees well with this power law and disagrees with the theoretical value of 2 based on the mean field approximation.