Anionic Polymerization of (Meth)acrylic Monomers. 7. Macrocyclic Crown Ethers as Promoters of the Living Polymerization of Methyl Methacrylate Using Monofunctional Initiators

Varshney, S. K.; Jérôme, Robert; Bayard, P.; Jacobs, C.; Fayt, R.; Teyssié, Philippe

doi:10.1021/ma00044a001

Article (Scientific journals)

Anionic Polymerization of (Meth)acrylic Monomers. 7. Macrocyclic Crown Ethers as Promoters of the Living Polymerization of Methyl Methacrylate Using Monofunctional Initiators

Varshney, S. K.; Jérôme, Robert; Bayard, P. et al.

1992 • In Macromolecules, 25 (18), p. 4457-4463

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https://hdl.handle.net/2268/242710

DOI
10.1021/ma00044a001

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Keywords :

Anionic polymerization; Crown ethers; Dimethylsodium; Living polymerization; Methacrylic Monomers; Methyl methacrylate; Monofunctional initiators; Promoters; Catalysts

Abstract :

[en] It has been previously shown that μ-coordinating inorganic salts, such as LiCl, were effective in preventing the anionic polymerization of methacrylic esters and hindered alkyl acrylates from being disturbed by secondary transfer and termination reactions. That strategy has opened the way to the “living” polymerization of these monomers and their controlled sequential polymerization with monomers lacking a carbonyl-conjugated group. That control is however limited to THF at low temperatures for methyl methacrylate and tert-butyl acrylate. It is reported now that the polymerization mechanism remains strictly controlled in apolar solvents, such as toluene, and at temperatures as high as 0 °C, when crown ethers are used in relation to their capability of chelating the alkali-metal counterion and surrounding it with a steric barrier blocking a large enough space area around the metal-containing ion pair. © 1992, American Chemical Society. All rights reserved.

Disciplines :

Chemistry

Author, co-author :

Varshney, S. K.; Laboratory of Macromolecular Chemistry and Organic Catalysis, University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium, Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, PQ, H3A 2K6, Canada

Jérôme, Robert ; Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)

Bayard, P.; Laboratory of Macromolecular Chemistry and Organic Catalysis, University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium

Jacobs, C.; Laboratory of Macromolecular Chemistry and Organic Catalysis, University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium

Fayt, R.; Laboratory of Macromolecular Chemistry and Organic Catalysis, University of Liège, Sart-Tilman, B6, 4000 Liège, Belgium

Teyssié, Philippe ; Université de Liège - ULiège > Relations académiques et scientifiques (Sciences)

Language :

English

Title :

Anionic Polymerization of (Meth)acrylic Monomers. 7. Macrocyclic Crown Ethers as Promoters of the Living Polymerization of Methyl Methacrylate Using Monofunctional Initiators

Publication date :

1992

Journal title :

Macromolecules

ISSN :

0024-9297

eISSN :

1520-5835

Publisher :

American Chemical Society, United States - District of Columbia

Volume :

Issue :

Pages :

4457-4463

Peer reviewed :

Peer Reviewed verified by ORBi

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since 05 January 2020

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