Grafting Copolymerization of (Sodium Alginate/ Acrylic Acid/ MethacrylicAcid) by Gamma Radiation: Preparation and Characterization

Abstract

Grafted copolymer (sodiumalginate (Na. Alg)-acrylic acid (AcA)methacrylic acid (MAcA)) was prepared by the gamma irradiation-induced copolymerization in the presence of N, N-methylene bis-acrylamide (MBA) as aco monomer crosslinker. The functionality, morphology and thermal stability of the prepared copolymer have been examined using FTIR spectroscopy, SEM, and TGA-DTA, respectively. The prepared material shows a smooth surface and relatively homogeneous appearance which reveals incompatibility between the monomers used. Thermal analysis of the prepared material shows stability near 400°C. The effect of the preparation conditions on the swelling property of the prepared copolymer has been investigated and the mechanism of grafting copolymerization through the irradiation process has been also discussed. The obtained results revealed that the optimum conditions for preparing a suitable grafted copolymer were using 20% Acrylic acid, 10% Methacrylic acid and 0.4 wt% sodium alginate at an irradiation dose of 15 kGy with the addition of 0.03 % of MBA as a crosslinker.

Water-Soluble Starch-Based Copolymers Synthesized by Electron Beam Irradiation: Physicochemical and Functional Characterization

“…In other words, we can consider that, in terms of the glass transition temperature, the graft copolymers showed better thermal stability than the homopolymer (pAMD). Other reports also revealed that natural polysaccharides grafted with vinyl monomer by means of ionizing radiation had good thermal stability in the field of practical applicability [ 47 , 70 , 71 ]. Moreover, da Silva et al [ 33 ] clearly proved that grafting of pAMD chains onto the polysaccharides enhances their thermal stability.…”

Proficiency of Some Synthetic Alginate Derivatives for Sequestration of Iodine-131 from Radioactive Liquid Waste

“…The obtained results showed that employing 20% AcA, 10% MAcA, and 0.4 weight percent NaAlg at an irradiation dose of 15 KGy with the addition of 0.03% MBA as a crosslinker are the ideal circumstances for producing a good grafted co polymer. All ingredients are combined in glass tubes and given a 25 kGy dose of 60Co gamma radiation [9][10].…”

“…Alginate salt is a natural polymer that has been used to mix with synthetic polymers like acrylic acid and its derivatives [7][8][9].…”

Biochemical Fulvic Acid Modification for Phosphate Crystal Inhibition in Water and Fertilizer Integration

“…Studies indicate that cation binding sites in fulvic acid are mainly carboxylic groups [ 35 , 36 , 37 ], and the chemical modification of BFA to improve its carboxyl content can effectively solve the problem. Among the various modifiers, AA is chosen because it is easy to polymerize and able to provide the necessary carboxylic groups [ 38 , 39 , 40 , 41 ]. Potassium peroxydisulfate is a quite effective initiator in grafting copolymerization [ 42 , 43 , 44 ].…”