Abstract: STUDY ON OXIDATIVE AND RADIATIONPOLYMERIZATION OF LINSEED OIL Ju Xuecheng\ Zhang Yanqun\ Ha Hongfei(Department of Technical Physics, Peking University, Beijing 100871)Abstract The effect of absorbed dose, dose rate, contents o f cobaltous naphthenate, trimethylolpropane triacrylate(TMPTA) and their synergi s tic action on radiation polymerization of oxidative polymerized linseed oil are s tudied. The resnlts show that active oxygen content, iodine value, intrinsic vi scosity a nd acid value of linseed oil are changed during its oxidative polymerization. Io dine value of linseed oil is decreased with the increase of absorbed dose. The m ore dose rate, the more gel content with the same dose. Cobaltous naphthenate sh ows an accelerating effect on radiation polymerization of oxidative polymerized linseed oil, however, there is an optimum content of its use. TMPTA can also ef fectively accelerate radiation polymerization, but its acceleration effect becom es decreasing with its content raising. Cobaltous naphthenate and TMPTA have syn e rgistic accelerating action on radiation polymerization when they are used toget her, but their synergistic action become decreasing with content of TMPTA raisin g.;