ESR studies of the photodegradation of polyethylene containing trapped allylic free radicals
作者： S. Shimada , H. Kashiwabara , J. Sohma
DOI: 10.1002/POL.1970.160080804
关键词: Irradiation 、 Photodegradation 、 Ultraviolet visible spectroscopy 、 Photodissociation 、 Radiation chemistry 、 Photochemistry 、 Radical 、 Chemistry 、 Polyethylene 、 Allylic rearrangement
摘要: Changes produced in γ-irradiated polyethylene by subsequent ultraviolet irradiation have been investigated ESR measurements, spectroscopy, and viscometric determination of average molecular weight. The photoinduced changes depend on the wavelength irradiation. Upon at wave length greater than 3900 A, main-chain scission occurs reaction trapped allylic radicals: A reduction weight sndicated this was verified fractionation experiments determinations.
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