Preirradn. of styrene under total dosage 5 ?104 Gy of g-ray radiation and different dose rate 2.9 Gy/s, 0.7 Gy/s, 0.5 Gy/s and 0.3 Gy/s were investigated. The peroxides formed during preirradn. were separated by silica gel column chromatog. in 3 components, 1, 2 and 3, resp. The distribution of components was different with different dose rates. When the dose rate was 0.3 Gy/s, the formed peroxide contained only the single component 2. The structures of 3 components were studied by IR, 1H NMR and MS. The component 2, with the structure of alternating peroxide, possesses strong polymerisation- reactivity and initiates smoother polymerisation than BPO at lower temps. and shorter times. It also initiates polymerisation of Bu acrylate and acrylonitrile.

Key words: IRRADIATION POLYMERIZATION, INFRARED SPECTROPHOTOMETRY, STYRENE, RADIATION DOSES, MASS SPECTROGRAPHY, NMR SPECTROMETRY, COLUMN CHROMATOGRAPHY, STRUCTURE AND PROPERTY CORRELATION, PEROXIDE, GAMMA RADIATION