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Influence of mechanical stress on the molar mass distribution and the rheological behavior of polysaccharides
Author(s) -
Windhab E.,
Zu Höne T.
Publication year - 1992
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19920610125
Subject(s) - rheology , molar mass , xanthan gum , guar gum , materials science , viscosity , stress (linguistics) , macromolecule , guar , molar mass distribution , composite material , chemistry , polymer , biochemistry , linguistics , philosophy
The mechanical stress acting on hydrocolloid macromolecules in flow processes may change the molecular structure, the rheological properties, affecting the technical function and thereby the properties. This paper introduces a newly developed method for definite “mechanical stress treatment” of xanthan and guar gum. Rheological measurements (intrinsic viscosity) and chromatography (GPC) allowed the resulting rheological and structural changes to be quantified.