Physicochemical, thermal and rheological properties of synthesized carboxymethyl tara gum (Caesalpinia spinosa).

Carboxymethyl tara gum (CMTG) was synthesized from the reaction between tara gum (TG) and monochloroacetic acid (MCA) in the presence of sodium hydroxide. The modification reaction was optimized in terms of the MCA/NaOH ratio, reaction time and temperature evaluated for degree of substitution (DS). The etherification was confirmed by FTIR and C NMR spectroscopy, and it was characterized by different analyses.