Normalized chain breaks with irradiation

Figure 2. Normalized chain breaks with irradiation in accelerometer film thickness, 0.2 mm...

The optical absorption of the unirradiated and irradiated samples was measured. The spectrum of unirradiated sample has two peaks at 200 and 275 mn. The intensity absorption of ultraviolet region increased with increasing the dose and new absorption band was observed at 215 nm after gamma-ray irradiation. The optical densities normalized by that of unirradiated sample as shown in Fig. 4. Several absorption peaks at 200, 215 and 275 nm were associated with fluorocarbon and peroxy radicals and C=0 groups respectively 131. The cross-linkage and chemical bond breaking of the polymer chain were caused by gamma-ray irradiation. 

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