Synthesis of block copolymers of isobutylene with diene monomers by the method of active center transformation

It was shown that block copolymers of isobutylene containing polybutadiene or butadiene-styrene (statistical) blocks, in principle, can be prepared by the anionic polymerization of butadiene or a butadienestyrene mixture init iated by model systems of diphenylalkyl type. Model initiators were obtaine d by the reaction of alkali metals with the product of interaction between the active centers of living cationic poly(isobutylene) and 1,1 -diphenylet hylene. The specific features of the reaction between sterically hindered d iphenylalkylenes and alkali metals are also discussed.