Preparation and characterization of phosphorylated chitosan films via graft copolymerization

Graft copolymerization of bis (2-methacryloyl oxy ethyl) acid phosphate (BAP) on to chitosan initiated by potassium per sulphate (KPS) under N2 atmosphere has been studied. The effect of polymer concentration, monomer concentration, polymerization temperature, initiator concentration and polymerization time on the grafting yield have been investigated. The copolymers were characterized by FTIR, SEM, DSC, and contact angle measurement. Swelling and dissolution behaviour of grafted polymer was followed in different buffer solutions (pH = 3, 7, and 11). Keywords: Chitosan, Phosphorylated Chitosan, Contact Angle, BAP