SYNTHESIS OF POLY(ACRYLAMIDE-CO-ACRYLIC ACID)-STARCH BASED SUPERABSORBENT HYDROGELS BY GAMMA RADIATION: STUDY ITS SWELLING BEHAVIOR - Erizal, Erizal; Centre for the Applications Isotopes and Radiation Technology, BATAN, Jl. Lebak Bulus Raya no. 49, Jakarta 12070 (Universitas Gadjah Mada, 2012)