The solution copolymerizations of tetrafluoroethylene (TFE) with isobutyl vinyl ether (iBuVE), using both conventional radical and RAFT/MADIX methods are presented. O-Ethyl-S-(1-methyloxycarbonyl)ethyl xanthate and benzoyl peroxide (BPO) were used as RAFT chain transfer agent and initiator, respectively, in dimethyl carbonate. Degrees of polymerization ca. 20 were targeted. In all cases, alternating copolymers were obtained. Poly(TFE-alt-iBuVE) copolymers synthesized via conventional radical copolymerization using from 1 to 30 mol % BPO exhibited molar masses varying between 11000 and 4400 g•mol-1 , respectively, and broad dispersities (Ð = 2). Poly(TFE-alt-iBuVE) copolymers synthesized by RAFT/MADIX had molar masses ranging from 1200 to 2000 g•mol-1 at 15 min to 24 hrs, respectively, and more narrow Ðs (1.08 and 1.11, respectively). The ratio of chain ends is nearly time invariant, with a slight
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