Abstract
Gels have been prepared from guar and hydroxypropyl guar gums by heating in alkaline media. The rheological properties of the gels have been examined using an Instron testing machine. Two kinds of small deformation experiments have been performed: Young's modulus measurements and stress relaxation tests. The influence of various parameters: pH, polysaccharide concentration on the formation of gels, has been investigated. It is shown that gel formation occurs at lower pH for hydroxypropyl guar compared with unmodified guar.
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