Summary: A polyfunctional 1,1‐diphenylethylene (DPE) agent was prepared by ring‐opening metathesis polymerization of a DPE‐functionalized norbornene monomer. Its reaction with sec‐butyllithium gave a novel polyfunctional anionic macroinitiator with one 1,1‐diarylalkyllithium initiation functionality per repeating unit. The significant applicability of this polyfunctional anionic macroinitiator was demonstrated by its excellent initiation efficiencies in anionic polymerization and a preparation of a graft copolymer with well‐controlled long and dense diblock grafts.
Preparation of a polyfunctional anionic macroinitiator based on ROMP and DPE chemistry.
