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Multiblock Copolymers: PEO Stuck in the Middle

✍ Scribed by Robert B. Grubbs

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
69 KB
Volume
206
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Summary: Anionic polymerization has proven especially useful for the precise construction of multiblock copolymers with controlled compositions and narrow molecular weight distributions. The block copolymer sequences which can be easily prepared are however largely restricted by the relative nucleophilicities of the anionic species involved. This highlight discusses a recent article by Wiesner and co‐workers (Macromol. Rapid Commun. 2004, 25, 1889) in which the effective preparation of ABC triblock copolymers, with poly(ethylene oxide) as the central block, through the combination of living anionic polymerization, atom transfer radical polymerization, and polymer modification techniques is described. This method will prove to have a great deal of versatility in allowing the incorporation of PEO blocks in interior positions of block copolymers.
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✍ Surbhi Mahajan; Byoung-Ki Cho; JΓΌrgen Allgaier; Lewis J. Fetters; Geoffrey W. Co πŸ“‚ Article πŸ“… 2004 πŸ› John Wiley and Sons 🌐 English βš– 127 KB

## Abstract **Summary:** Stepwise anionic polymerization, catalytic hydrogenation, and atom transfer radical polymerization were performed to synthesize an amphiphilic ABC triblock copolymer, poly(ethylene‐__alt__‐propylene)‐__block__‐poly(ethylene oxide)‐__block__‐poly(hexyl methacrylate) (PEP‐__b