Refine your search�ソスF     
Report No.
 - 

Dynamic nuclear polarization of electron-beam irradiated polyethylene by pairs of alkyl free radicals

Kumada, Takayuki   ; Noda, Yohei; Ishikawa, Norito   

We compared dynamic nuclear polarization (DNP) behavior of electron-beam irradiated polyethylene (e-PE) with that of TEMPO-doped polystyrene (T-PS). Although both T-PS had a sharp maximum in nuclear polarization at the concentration of free radicals of 2$$times$$10$$^{19}$$ spins cm$$^{-3}$$, that of e-PE depend much less. Growth and decay rates of polarization of e-PE linearly increased with increasing the radical concentration, whereas those rates of T-PS increased with square of radical concentration. We concluded that, not a pair of unspecified radicals accidentally located nearby, but a pair of alkyl radicals produced by the dissociation of C-H bond by an electron irradiation and the subsequent hydrogen abstraction reaction play an important role on DNP of e-PE.

Accesses

:

- Accesses

InCites™

:

Percentile:34.88

Category:Biochemical Research Methods

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.