Abstract
AbstractLiving anionic polymerization of methacrylic esters initiated with aluminum porphyrins (1) was found to be dramatically accelerated (e.g., 46 000 times) upon addition of bulky Lewis acids such as alkylaluminum diphenolates (3). Under appropriate conditions, a narrow MWD poly(methyl methacrylate) with Mn exceeding a million could be synthesized. The key conception of this high speed living polymerization is the coexistence of nucleophile (2) and Lewis acid (3) realized by steric repulsion.
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