LANSON, David; ARIURA, Fumi; SCHAPPACHER, Michel; BORSALI, Redouane; DEFFIEUX, Alain

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LANSON, David
Laboratoire de Chimie des polymères organiques [LCPO]

ARIURA, Fumi
Laboratoire de Chimie des polymères organiques [LCPO]

SCHAPPACHER, Michel
Laboratoire de Chimie des polymères organiques [LCPO]

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Macromolecular Research. 2007, vol. 15, n° 2, p. 173-177

Springer

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Living anionic and cationic polymerizations have been combined to prepare various types of comb-like copolymers composed of polystyrene (PS) and polyisoprene (PI) blocks, with a precisely controlled architecture. According to the relative placement of these elementary building blocks, combs with randomly distributed PS and PI or with poly(styrene-b-isoprene) diblock branches (I & II, respectively) can be prepared. The reaction procedure initially includes the synthesis of a poly(chloroethylvinyl ether) using living cationic polymerization, which is used as the reactive backbone to successively graft PS-Li+ and PI-Li+ or PI-b-PS-Li+ to obtain structures (I) or (II). The synthesis of Janus-type PS-comb-b-PI-combs (III) initially involves the synthesis of a diblock backbone using living cationic polymerization, which bears two distinct reactive functions having either a protected or activated form. Living PS-Li+ and PI-Li+ are then grafted, in two separate steps, onto each of the reactive functions of the backbone, respectively.< Leer menos

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polyisoprene

polystyrene

topology

organization

living anionic polymerization

comb-like copolymers

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Application of living ionic polymerizations to the design of AB-type comb-like copolymers of various topologies and organizations

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