Abstract
A general method of transformation of living ring-opening metathesis polymerization (ROMP) into controlled/“living” atom transfer radical polymerization (ATRP) is reported for the preparation of block copolymers. For example, the macroinitiators PNB−C6H4−CH2Br (Mn = 30 520, Mw/Mn = 1.09) or PDCPD−C6H4−CH2Br (Mn = 12 100, Mw/Mn = 1.24) were prepared by ROMP of norbornene (NB) or dicyclopentadiene (DCPD) and subsequent Wittig-like reactions with p-(bromomethyl)benzaldehyde. These compounds were used as efficient macroinitiators for homogeneous controlled/“living” ATRP to prepare block copolymers with styrene (St), PNB-b-PSt (Mn = 110 400, Mw/Mn = 1.06) and PDCPD-b-PSt (Mn = 20 100, Mw/Mn = 1.37), and methyl acrylate (MA), PNB-b-PMA (Mn = 85 100, Mw/Mn = 1.07) and PDCPD-b-PMA (Mn = 25 300, Mw/Mn = 1.47).
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