Preparation and Characterizations Graft Copolymer of Poly(acrylamide-aniline)-Grafted Gum Ghatti

Abstract

Abstract Hydrogels consist an assembly of cross-linked polymer networks with the ability to swell and hold huge volumes of water without dissolving. This behavior will depend on the cross-linked structure and the presence of hydrophilic groups in the polymeric chains. In this article, the conducting superabsorbent hydrogels were obtained by a two-step aqueous polymerization via free radical polymerization. In the first step, the grafting of acrylamide on gum ghatti was initiated by ammonium persulphate (APS) and crosslinking it with N, N'-methylene-bis-acrylamide (MBA) under vacuum by optimizing various reaction parameters. In the final step, grafting of aniline monomers on optimized graft copolymer ie. Gg-poly(AAm) was initiated again by APS and crosslinking it with MBA under vacuum. The effect of dopant concentration on the current-voltage characteristics of the conducting interpenetrating network hydrogel was studied. The grafting was confirmed by using XRD, FTIR, SEM and thermogravimetric analysis techniques. An endeavors have been made to relate the outcomes with available data to make the present work more useful from a scientific perspective