| 摘要 |
To provide a process for producing a perfluorocarbon polymer, whereby a perfluorocarbon polymer having a high content of -SO2F groups and a high molecular weight can be efficiently obtained. The process comprises polymerizing a monomer mixture comprising the liquid monomer (A) of the following formula (1) and tetrafluoroethylene at a polymerization temperature of from 25 to 45° C. by sequentially or continuously adding an initiator of the following formula (2): <?in-line-formulae description="In-line Formulae" end="lead"?>CF2-CF(OCF2CFX1)k-O1-(CF2)m-(CF2CFX2)n-SO2F (1)<?in-line-formulae description="In-line Formulae" end="tail"?> wherein each of X1 and X2 which may be the same or different, is a fluorine atom or a trifluoromethyl group, k is an integer of from 0 to 3, l is 0 or 1, m is an integer of from 0 to 12, and n is an integer of from 0 to 3, <?in-line-formulae description="In-line Formulae" end="lead"?>[CF3CF2CF2O(CF(CF3)CF2O)pCF(CF3)COO]2 (2)<?in-line-formulae description="In-line Formulae" end="tail"?> wherein p is an integer of from 0 to 8.
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