Block copolymers by transformation of ''living'' carbocationic into ''living'' radical polymerization

This paper reports a general method of transformation of 'living' carbocationic into 'living' radical polymerization, without any modification of initiating sites, and successful preparation of block copolymers. It is demonstrated that, a PSt-Cl prepared cationically can be used as an efficient macroinitiator for homogeneous 'living' ATRP of styrene and (meth)-acrylates. This procedure is tested for isobutene, which can be polymerized cationically and for the synthesis of the corresponding triblock copolymers.