“…To date, the most successful approach to FM-CRP [1] remains the iodine degenerative transfer (IDT) [3,[9][10][11][12][13][14] (IDT: P n • + P m -I ⇌ P n -I + P m • ) [1,15,16], an outcome of the earlier research on the high temperature (100-230 • C) free radical VDF telomerization [17,18] with polyhalides [19], especially (per)fluorinated iodo chain transfer (CT) agents [16] such as CF 3 I [20][21][22][23], CF 3 CF 2 I [24], CF 3 (CF 2 ) 3 I [25,26], CF 3 (CF 2 ) 5 I [21,[27][28][29], (CF 3 ) 2 CF I [26], Cl CF 2 CFCl I [23], I (CF 2 ) 4-6 I [10, 29,30], but also with less active HCF 2 CF 2 CH 2 I [27,28], C 6 F 13 CH 2 CF 2 I [28,31], and even CH 2 I 2 [32], R F CH 2 CH 2 I [33], or CH 3 I [34]. In fact, IDT may be one of the oldest CRP methods, as a linear dependence of M n on polymer yield was already demonstrated ] in the early 1980s, and was the first industrial implemented CRP protocol [10][11][12][13][14].…”