Polyurethane macroinitiator for controlled monomer insertion of styrene

Yuji Higaki; Hideyuki Otsuka; Takeshi Endo; Atsushi Takahara

doi:10.1021/ma021091i

Polyurethane macroinitiator for controlled monomer insertion of styrene

Yuji Higaki, Hideyuki Otsuka, Takeshi Endo, Atsushi Takahara

Department of Applied Molecular Chemistry

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

Polyurethane containing alkoxyamine units in the main chain were prepared by polyaddition of diisocyanate with TEMPO-based diol. Radical polymerization of styrene was carried out in bulk with TEMPO-based polyurethane as macroinitiator. GPC, NMR, and IR data revealed that the insertion reaction was accurately controlled to afford the segmented copolymers composed of both urethane groups and polystyrene segments. From the results of model polymerization, it is inferred that the well-defined polystyrene chains were inserted into the macroinitiator. The obtained polymers showed quite different solubility in solvents compared with the macroinitiator and styrene homopolymer. The solubility in polar solvents decreases gradually with increasing inserted polystyrene chain length.

Original language	English
Pages (from-to)	1494-1499
Number of pages	6
Journal	Macromolecules
Volume	36
Issue number	5
DOIs	https://doi.org/10.1021/ma021091i
Publication status	Published - Mar 11 2003

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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AU - Higaki, Yuji

AU - Otsuka, Hideyuki

AU - Endo, Takeshi

AU - Takahara, Atsushi

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AB - Polyurethane containing alkoxyamine units in the main chain were prepared by polyaddition of diisocyanate with TEMPO-based diol. Radical polymerization of styrene was carried out in bulk with TEMPO-based polyurethane as macroinitiator. GPC, NMR, and IR data revealed that the insertion reaction was accurately controlled to afford the segmented copolymers composed of both urethane groups and polystyrene segments. From the results of model polymerization, it is inferred that the well-defined polystyrene chains were inserted into the macroinitiator. The obtained polymers showed quite different solubility in solvents compared with the macroinitiator and styrene homopolymer. The solubility in polar solvents decreases gradually with increasing inserted polystyrene chain length.

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Polyurethane macroinitiator for controlled monomer insertion of styrene

Abstract

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