Synthesis of Well‐Defined Polybenzamide‐ block ‐Polystyrene by Combination of Chain‐Growth Condensation Polymerization and RAFT Polymerization | Zendy

Masukawa Tomohiro | Zendy; Yokoyama Akihiro | Zendy; Yokozawa Tsutomu | Zendy

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Synthesis of Well‐Defined Polybenzamide‐ block ‐Polystyrene by Combination of Chain‐Growth Condensation Polymerization and RAFT Polymerization

Author(s) -

Masukawa Tomohiro,

Yokoyama Akihiro,

Yokozawa Tsutomu

Publication year - 2009

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.200900150

Subject(s) - chain transfer , reversible addition−fragmentation chain transfer polymerization , polymer chemistry , raft , living polymerization , polymerization , copolymer , living free radical polymerization , polystyrene , radical polymerization , materials science , dispersity , styrene , catalytic chain transfer , chain growth polymerization , chemistry , polymer , composite material

Well‐defined diblock copolymers composed of poly( N ‐octylbenzamide) and polystyrene were synthesized by reversible addition‐fragmentation chain transfer (RAFT) polymerization of styrene with a polyamide chain transfer agent (CTA) prepared via chain‐growth condensation polymerization. Synthesis of a dithioester‐type macro‐CTA possessing the polyamide segment as an activating group was unsatisfactory due to side reactions and incomplete introduction of the benzyl dithiocarbonyl unit. On the other hand, a dithiobenzoate‐CTA containing poly( N ‐octylbenzamide) as a radical leaving group was easily synthesized, and the RAFT polymerization of styrene with this CTA afforded poly( N ‐octylbenzamide)‐ block ‐polystyrene with controlled molecular weight and narrow polydispersity.

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