Rate of elapsed polymerization of hydroxyethylacrylate gel induced by gamma irradiation

Rate of elapsed polymerization of hydroxyethylacrylate gel induced by gamma irradiation 1 corresp first-author Corresponding author. E-mail address: elias@putra.upm.edu.my Corresponding author. E-mail address: elias@putra.upm.edu.my elias@putra.upm.edu.my 1 1 1 1 1 2 Department of Physics, Universiti Putra Malaysia 43400 UPM Serdang, Selangor, Malaysia Department of Physics, Universiti Putra Malaysia 43400 UPM Serdang, Selangor, Malaysia Nuclear Agency of Malaysia, 43000 Kajang, Selangor, Malaysia Nuclear Agency of Malaysia, 43000 Kajang, Selangor, Malaysia The rate of elapsed polymerization of polyhydroxyethylacrylate in gelatin has been studied to investigate the effect of co-monomers consumption at a given dose. The polymer gel dosimeters consisted of 2%~4% N , N -methyelene-bis-acrylamide cross-linker, 2%~4% 2-hydroxyethylacrylate monomer and gelatin at 3% and 5%. The dosimeters were irradiated by using 60 Co teletherapy γ g -ray source up to 20 Gy at a constant dose rate. The relaxation rate of water proton in the dosimeters at different doses and co-monomer concentrations were measured using a nuclear magnetic resonance spectroscopy. The rate of elapsed polymerization decreases with increasing the dose and the initial concentration of co-monomers. The rate of consumption of co-monomers increases with an increase of the polymerization and the gelatin content of the polymer gel. Elapsed polymerization Relaxation rate Consumption rate Polymer gel dosimeter References Jr Novotny J , Spevacek V , Dvorak P , et al . Phys Chem , 2001 , 16 : 225 - 228 . Phys Chem Gore J C , Kang Y S , Schulz R J . Phys Med Biol , 1984 , 29 : 1189 - 1197 . Phys Med Biol Kron T , Jonas D , Pope J M . Magn Reson Imaging , 1997 , 15 : 211 - 221 . Magn Reson Imaging Maryanski M J , Gore J C , Schulz R J . Magn Reson Imaging , 1993 , 11 : 253 - 258 . Magn Reson Imaging Pappas E , Maris T , Angelopoulos A , et al . Phys Med Biol , 1999 , 44 : 2677 - 2684 . Phys Med Biol Vergote K , De Deene Y , Claus F , et al . Oncol , 2003 , 67 : 119 - 128 . Oncol Maryanski M J , Schulz R J , Ibbott G S , et al . Phys Med Biol , 1994 , 39 : 1437 - 1455 . Phys Med Biol De Deene Y , Baldock C . Phys Med Biol , 2002 , 47 : 3117 - 3141 . Phys Med Biol Lepage M , Whittaker A K , Rintoul L , et al . Phys Med Biol , 2001 , 46 : 1061 - 1074 . Phys Med Biol Gustavsson H , Back S , Lepage M , et al . Phys Med Biol , 2004 , 49 : 227 - 241 . Phys Med Biol Jirasek A I , Duzenli C , Audet C , et al . Phys Med Biol , 2001 , 46 : 151 - 165 . Phys Med Biol 10.1016/S1001-8042(08)60053-6 O631.3 + 4 2007-12-19 2008-08-20 2021-01-19 2008 Nuclear Science and Techniques 04 19