Living cationic polymerization of isobutyl vinyl ether, 2

A Renaissance in Living Cationic Polymerization

“…[395][396][397] On the other hand, polymeric azo compounds were also prepared by the termination of living poly(VE) with an azo-containing alcohol. 398 With the advent of living/controlled radical polymerization, the synthesis of well-defined block copolymers having various monomer units that do not undergo cationic polymerization has been expanded, as shown in Figures 25 and 26. PSt with chlorine termini, obtained by living cationic polymerization with R-Cl/Lewis acid, was subsequently used for the ATRP of acrylates and methacrylates, without any additional reactions (68).…”

Block Copolymers by Transformation of “Living” Carbocationic into “Living” Radical Polymerization

“…There were attempts to combine "living" cationic polymerization with conventional radical polymerization. For example, methacrylonitrile 27 and benzyl methacrylate 28 were radically polymerized from welldefined poly(vinyl ethers) with terminal azo-initiating sites. Obviously, the second-stage free radical polymerization is not controlled in term of molecular weight and polydispersity, so that the product may be a mixture of desired block copolymers and the respective homopolymers.…”