Abstract
The ESR spectra of γ-irradiated N,N,N",N"-tetramethyl-4,4"-diaminodiphenylmethane (Am) in solid solutions of poly(vinyl chloride), poly(methyl methacrylate), and benzene were studied. The formation mechanism of the free radical Am·in these solutions was discussed. Along with Am·, the formation of radicals with the cyclohexadienyl structure was shown to be possible in Am irradiation. The influence of the matrix structure on the radiation-chemical yield of Am·radicals and their thermal stability was established. The radiation-induced chemical transformations of free radicals and transient ionic species resulting in the formation of terminal alkyl radicals in poly(methyl methacrylate) were investigated. Data on the mechanism of the protective action of the Am additive during PMMA radiolysis were obtained.
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