Poly(N-vinylcarbazole) Star Polymers and Amphiphilic Star Block Copolymers by Xanthate-Mediated Controlled Radical Polymerization

Poly(N-vinylcarbazole) Star Polymers and Amphiphilic Star Block Copolymers by Xanthate-Mediated Controlled Radical Polymerization

Four-arm poly(N-vinylcarbazole), poly(NVC), stars were synthesized by reversible addition−fragmentation chain transfer (RAFT) polymerization/macromolecular design via interchange of xanthates (MADIX) using three different xanthate-type tetrafunctional chain transfer agents (CTAs). Two Z-designed CTA...

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Veröffentlicht in:Macromolecules 2008-10, Vol.41 (19), p.6925-6934
Hauptverfasser: Mori, Hideharu, Ookuma, Hiroshi, Endo, Takeshi
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Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
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container_title Macromolecules
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creator Mori, Hideharu
Ookuma, Hiroshi
Endo, Takeshi
description Four-arm poly(N-vinylcarbazole), poly(NVC), stars were synthesized by reversible addition−fragmentation chain transfer (RAFT) polymerization/macromolecular design via interchange of xanthates (MADIX) using three different xanthate-type tetrafunctional chain transfer agents (CTAs). Two Z-designed CTAs having different R (leaving) groups, in which the Z (stabilizing) groups are linked to the core, and one R-designed CTA were compared. The R-group approach was found to be the most efficient for the controlled synthesis of four-arm poly(NVC) stars having a low polydispersity and controlled molecular weights. Amphiphilic star block copolymers were synthesized by the polymerization of NVC using the poly(acrylic acid) star, which was prepared from the R-designed tetrafunctional CTA. The characteristic assembled structures and optical properties of the amphiphilic star block copolymers in selective solvents were investigated by dynamic light scattering (DLS), UV−vis, and fluorescence spectroscopic methods.
doi_str_mv 10.1021/ma801266h
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subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
title Poly(N-vinylcarbazole) Star Polymers and Amphiphilic Star Block Copolymers by Xanthate-Mediated Controlled Radical Polymerization
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