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Thermally induced conformation change of xanthan: interpretation of viscosity behaviour in 0.01 m aqueous sodium chloride

✍ Scribed by Wei Liu; Takashi Norisuye


Book ID
119070235
Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
652 KB
Volume
10
Category
Article
ISSN
0141-8130

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Weight-average molecular weights M,, second virial coefficients, and z-average radii of gyration (S2):/2 were determined by light scattering as a function of temperature T for four sodium salt samples of xanthan in 0.01M aqueous NaCI, in which the polysaccharide undergoes an order-disorder conformat

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Six samples of Na xanthan in 0.01M aqueous NaCl containing 0.01 N HCl (pH = 2) were studied by light scattering and viscosity. This study was motivated by the finding that the intrinsic viscosity [ q ] fairly sharply decreased when the pH of the solvent was lowered from about 6 to 2 by adding HC1 to