Fig. 6: SEC analyses of block copolymerization.

a SEC traces of poly-2₂₀ and the corresponding poly(2₂₀-b-1a₄₀) copolymer. b Plots of the M_n and M_w/M_n data of poly(2₂₀-b-1a_n)s vs. [1a]₀/[Ni]₀ ratio for the copolymerization of 1a initiated by poly-2₂₀ with the Ni(II) complex at the chain end.