An important discovery was made by Rumiko
Fujioka et al.to increase biodegradability of
native guar by esterification of succinate group
on polymer chain. They designed novel
superabsorbent hydrogels in DMSO by action of succinic anhydride with guar where 4-
dimethylaminopyridine was utilized as a
catalyst. Resultant hydrogels exhibit excellent
water absorbency and biodegradability that
establish them as ideal candidate for biomedical applications. M. A. Shenoy et al.
acetylated the HPG (hydroxypropyl guar) to
use it as filler in unsaturated polyester
composites. Derivatized guar increased fillerpolymer
interaction by increasing hydrophobic
nature of polymer. Introduction of
hydrophobicity in hydroloyzed guar gum
(GGH) and gum Arabica was furnished by S. Sarkar, R. S. Singhal87 by reacting gums with
n-octenyl succinic anhydride (OSA) and oleic
acid. The reaction conditions were optimized
for maximum degree of substitution (DS)
which was 0.061, 0.072 for guar oleate, guar
n-octenyl succinate, respectively. Resultant
esters was analyzed as wall materials in
microencapsulation.