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Citation: Mao You-Gang, Zheng Ying-Guang, Wang Guo-Bin, Shen Jia-Cong. The Alternating Broadening Effect of the ESR Spectra for Styrene Propagating Radical in Bulk Polymerization[J]. Acta Physico-Chimica Sinica, ;1993, 9(05): 610-616. doi: 10.3866/PKU.WHXB19930508 shu

The Alternating Broadening Effect of the ESR Spectra for Styrene Propagating Radical in Bulk Polymerization

1.
Intitute of Theoretical Chemistry, Department of Chemistry, Jilin University, Changchun 130023

Received Date: 2 March 1992
Available Online: 15 October 1993

The relaxation-matrix theory of line width analysis in electron spin resonance spectra has been used to analyze the alternating line width effects arising from the motion of β protons of propagating radical, this motion was treated by using a Brow-nian motion model assuming a torsional oscillations about the C_α—C_β bond. The formula of line-width for β-protons obtained were applied to the analysis of the ESR spectra for styrene radicals in the whole process of bulk polymerization to explain the time dependence on polymerization. The results also support the assignment of the β protons hfs-constants.
- Alternating broaden effect; ESR; Propagating radical; Styrene
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