Ceric ammonium nitrate‐initiated graft copolymerization of acrylamide onto Cassia tora gum

Abstract

Graft copolymerization of acrylamide onto Cassia tora gum was studied in an aqueous medium using ceric ammonium nitrate-nitric acid as the redox initiator. To optimize the reaction conditions for obtaining maximum percent grafting, the concentrations of Cassia tora gum, ceric ammonium nitrate, acrylamide, and nitric acid, time, and temperature were varied. Results are discussed and a reaction mechanism is proposed.

Graft copolymerization of acrylamide onto tamarind kernel powder in the presence of ceric ion

“…Among chemical methods, redox‐initiated grafting is advantageous because in the presence of redox systems, grafting can be carried out under milder conditions with minimum side reactions. Grafting of acrylamide (AA) onto natural polymers such as starch,4–7 sodium alginate,8 dextran,9, 10 xanthan,11 guar gum,12 and Cassia tora gum13 has been studied using different redox systems.…”

Graft copolymerization of water‐soluble monomers containing quaternary ammonium group on poly(vinyl alcohol) using ceric ions

“…But the rate and extent of grafting by this method are usually low due to hindered diffusion of preformed polymers. Grafting of vinyl monomers onto natural polymers like guar gum, 8 starch, 9,10 and cellulose [11][12][13][14] by employing the ceric ion technique has been studied. Graft copolymerization is a powerful tool for obtaining polymers with new properties and applications.…”

Native and microwave-modified Terminalia mantaly gums as sustained-release and bioadhesive excipients in naproxen matrix tablet formulations

“…The ability to maintain a delivery system at a particular location for an extended period of time has great appeal for local action as well as systemic drug bioavailability. 5 Natural gums have been found to be biocompatible and non-irritating, and they possess excellent binding and bioadhesive properties. 6 However, there may be a need to modify these gums in order to achieve the desired formulation effects.…”