Radiation graft-copolymerization onto polyethylene film
The results of studies on grafting acrylic and methacrylic acids and N-vinylpyrrolidone onto polyethylene film have been presented. It has been demonstrated that under the action of gamma-irradiation (irradiation in a low-dose-rate source) there are formed radicals with a spectrum identical to that of radicals formed in an electron accelerator, but their efficiency as initiators of graft copolymerization is lower. A film irradiated in an isotope radiation source can be used in grafting with the utilization of the after-effect. On the other side, a high-dose-rate irradiation from an electron accelerator is an effective agent in the initiation of the grafting reaction of monomers directly in the irradiation field. An advantage of the utilization of the after-effect in comparison with the direct initiation is a limitation of the monomer homopolymerization reaction.
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