Effect of γ-irradiation on the molecular–topological structure of a copolymer of tetrafluoroethylene and perfluoro(propyl vinyl ether)
Yu.A. Ol'khovInstitute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, RussiaS. R. AllayarovInstitute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, RussiaM. Yu. TashmetovInstitute of Nuclear Physics, Academy of Sciences of Uzbekistan, Tashkent, 100214, UzbekistanDavid A. DixonDepartment of Chemistry, Box 870336, The University of Alabama, Tuscaloosa, Alabama, AL, 35487-0336, USA
ABI
Аннотация
The molecular–topological structure of a copolymer of tetrafluoroethylene and perfluoro(propyl vinyl ether) before and after γ-irradiation has been studied for the first time. The pseudo-network structure of the copolymer contains an amorphous block and the crystalline segments of macromolecules serve as branching points. After γ-irradiation to a dose of 15 to 2380 kGy, polyassociative cluster-type entities have appeared in the initial copolymer in place of the crystalline branching points with simultaneous structure amorphization and a decrease in the onset temperature of molecular flow.
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