Add time:08/17/2019         Source:sciencedirect.com

VEEGUM (cas 1327-43-1) HV and Veegum F suspensions, 2 per cent by weight in water, were found to be pseudoplastic at all ages for all temperatures of preparation and storage. The study is reported over the time range of a few hours to several months for temperatures from 6 to 88°. The logarithm of the apparent viscosity at any shear rate was found to be a linear function of the logarithm of time, and also to be a function of the reciprocal of temperature, obeying an Arrhenius type relation. The apparent activation energy for Veegum hydration was found to be 8000 calories per mole. A general equation is empirically derived to relate viscosity at any given shear rate with the temperature of storage and the age of the suspension.

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