Grafted copolymer (sodium alginate (Na. Alg)- acrylic acid (AcA)– methacrylic (MAcA)) was prepared by the gamma irradiation-induced copolymerization in presence of N, N-methylene bisacrylamide (MBA) as a co monomer crosslinker. The functionality, morphology and thermal stability have been examined using FTIR spectroscopy, SEM, TGA-DTA, respectively. surface grafted shows smooth relatively homog...