Fritz Welan Gum is an anionic polysaccharide

Fritz Welan Gum is an anionic polysaccharide with excellent thermal stability and retention of viscosity at elevated temperatures. Fritz Welan Gum exhibits superior temperature stability over 200° F in fresh water and low pH fluids. Fritz Welan Gum is a tan colored dry powder with a density of 26.25 lbs/ft³. Fritz Welan Gum is used in various industries where high molecular weight biopolymers are useful.

Welan Gum

The flow behavior and dynamic viscoelasticity of welan gum solutions were measured with a rheogoniometer. The welan gum showed shear-thinning behavior at a concentration of 0.1%, but plastic behavior above 0.3% at 25°C. The dynamic viscoelasticity increased with increasing concentration, and was scarcely changeable with increasing temperature even at 80°C. Gelation did not occur even in a polysaccharide concentration of 1.0% at low temperature (0°C). An increase of the dynamic modulus was not observed on the addition of CaCl2 (6.8 mm). The dynamic viscoelasticity of welan gum solution was scarcely changeable in a wide range of pH from 2 to 12. The dynamic modulus was also scarcely changeable on addition of urea (4.0 m). Possible mode of intramolecular associations between the OH-4 of the d-glucosyl residue and the adjacent hemiacetal oxygen atom of the l-rhamnosyl residue, and between the methyl group of the l-rhamnosyl residue and the adjacent hemiacetal oxygen atom of the d-glucosyl residue were proposed.

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