ESR STUDY ON THERMAL DECAY OF RADICALS TRAPPED IN HIGH-SPEED ELECTRON IRRADIATED F-40

Chinese Journal of Magnetic Resonance ›› 2000, Vol. 17 ›› Issue (3): 217-222.

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ESR STUDY ON THERMAL DECAY OF RADICALS TRAPPED IN HIGH-SPEED ELECTRON IRRADIATED F-40

XING Dali¹, ZHAO Xiangzhen², WANG Shoutai²

1 Dongguan Institute of Technology, Dongguan 523000;
2 Polymeric Materials Research Institute of Shanghai Jiaotong University, Shanghai 200240

Received:2000-01-25 Revised:2000-03-03 Published:2000-06-05 Online:2018-01-11

Abstract

Abstract: The mid-chain peroxyl radicals trapped in the samples irradiated in air are less stable than the end-chain peroxyl radicals. It was indicated that thermal decays of the trapped radicals are second-order reactions. The compensation effects in kinetics exist between the apparent activation energy and the pre-exponent factor which effect reaction rate constants contrarily. Such phenomenon indicates that thermal decays of the trapped radicals are complex reactions which occur simultaneously at many active centres.

Key words: Irradiated F-40, Trapped radicals, Kinetics of thermal decay, Compensation effect, ESR

XING Dali, ZHAO Xiangzhen, WANG Shoutai. ESR STUDY ON THERMAL DECAY OF RADICALS TRAPPED IN HIGH-SPEED ELECTRON IRRADIATED F-40[J]. Chinese Journal of Magnetic Resonance, 2000, 17(3): 217-222.

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ESR STUDY ON THERMAL DECAY OF RADICALS TRAPPED IN HIGH-SPEED ELECTRON IRRADIATED F-40

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