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Block Copolymer Synthesis via Chemoselective Stepwise Coupling Reactions
Author(s) -
Bellas Vasilios,
Rehahn Matthias
Publication year - 2009
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800463
Subject(s) - copolymer , dimethylsilane , monomer , polymer chemistry , polymer , reactivity (psychology) , polymerization , living anionic polymerization , chemistry , coupling reaction , materials science , combinatorial chemistry , anionic addition polymerization , organic chemistry , catalysis , medicine , alternative medicine , pathology
Chemoselective stepwise coupling between living polymers and a heterobifunctional‐linking agent is shown to be a powerful methodology for block copolymer synthesis. This synthetic strategy is based on the quantitative formation of end‐functionalized precursors in the first coupling step. These end‐functionalized precursors were reacted with further living polymers, thereby producing well‐defined diblock copolymers, triblock terpolymers and a tetrablock quaterpolymer. The behavior of chloro(chloromethyl)dimethylsilane, chloro(3‐chloropropyl)dimethylsilane and (bromomethyl)chlorodimethylsilane against macroanions of different reactivity, prepared through living anionic polymerization, was studied. It is demonstrated that the applicability range of the presented methodology is exceptionally wide, and expands the limits of conventional methods based on sequential monomer addition considerably.