FIELD: chemistry.
SUBSTANCE: method is realised via copolymerisation of tetrafluoroethylene (TFE) and perfluro(3,6-dioxy-4-methyl-7-octene)sulfonylfluoride (FS141) in a medium of organic solvent. Copolymerisation is carried out in a medium of solvent - 1,2-dichlorohexafluorocyclobutane (RC 316) at pressure 2.5-5 atm using bis(perfluorocyclohexanoyl)peroxide as an initiator.
EFFECT: low explosion hazard of the process and replacement of the ozone-decomposing solvent by an environmentally safe solvent.
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