Thin films of sodium alginate (SA) were prepared by casting from methanol solutions. Tensile strength and elongation at break (Eb%) of the films were found to be 20.4 MPa and 11.6 %, respectively. A series of SA solutions (formulations) were prepared by blending varying percentages (2-8 % by wt) of ethylene glycol (EG) and then films were prepared and cured under UV radiation at different intensities (5-35 UV passes). Monomer concentration, soaking time, and radiation dose were optimized in terms of polymer loading and mechanical properties of the cured films. For the improvement of the properties, several acrylic monomers of different functionalities as additives (2 %) like 2-ethylhexyl acrylate, 1,4-butanediol diacrylate, and trimethylolpropane triacrylate were incorporated with EG with the aid of UV radiation. Further analyses of the prepared films were characterized by FTIR and thermogravimetric analysis. Water uptake behavior was determined for the raw and cured SA films.