Luděk Toman, Miroslav Janata, Jiří Spěváček, Petr Vlček, Petra Látalová, Bohumil Masař and Antonín Sikora Sequential synthesis of multiblock copolymers by atom transfer radical and cationic polymerization Journal of Polymer Science Part A: Polymer Chemistry 42
Multiblock copolymers of methyl methacrylate (MMA), styrene (S), and isobutylene (IB) were synthesized through a combination of atom transfer radical polymerization (ATRP) and cationic polymerization. First, the poly(S-b-MMA-b-S) triblock copolymer was prepared by ATRP, and then IB was polymerized cationically with the triblock macroinitiator in conjunction with BCl3. This produced a poly(IB-b-S-b-MMA-b-S-b-IB) pentablock copolymer.
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