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A simple non-aqueous method for the preparation of carboxymethyl (CM) derivatives of galactomannans and other biopolymers has been developed. Galactomannans such as guar, tara and locust bean gums were subjected to carboxymethylation using monochloroacetic acid under the catalytic influence of NaHCO 3 in dry state. The ratios of reagent and catalyst as well as the temperature and duration...
Carboxymethyl guar gum was synthesized with a simple dry and multi-step method for the first time as a product of the reaction of guar gum and monochloroacetic acid in the presence of sodium hydroxide. The influences of a variety of reaction parameters for degree of substitution were evaluated. The product was characterized by a variety of material characterization techniques. FTIR showed new bonds...
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