Molecular–topological structure of tetrafluoroethylene–perfluoromethylvinyl ether copolymer irradiated with MeV protons
S. R. AllayarovInstitute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, RussiaYu.A. Ol'khovInstitute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, RussiaM.K. AsamovFaculty of Chemistry, Ulugbek National University of Uzbekistan, Tashkent, 100174, UzbekistanDavid A. DixonDepartment of Chemistry, Box 870336, The University of Alabama, Tuscaloosa, Alabama AL, 35487-0336, USA
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Abstract
The molecular–topological structure of a copolymer of tetrafluoroethylene and perfluoromethylvinyl ether has been studied for the first time before and after irradiation with 1- and 4-MeV protons. The pseudo-network structure of the copolymer contains an amorphous block and crystalline segments of macromolecules as branching points. After bombardment with protons, a high-temperature amorphous block is formed in the copolymer with simultaneous complete amorphization of the copolymer structure and a decrease in its molecular flow temperature. The surface of a target plate with a thickness of 500 μm that has not been directly exposed to proton bombardment preserves the molecular–topological structure of the initial copolymer.
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