Synthesis of AB(BA), ABA and BAB block copolymers of tert‐butyl methacrylate (A) and ethylene oxide (B)

Anionic polymerization; Catalysts; Infrared spectroscopy; Monomers; Nuclear magnetic resonance; Synthesis (chemical); Comonomers; Functional initiators; Polyacid/polyether block copolymers; Sequential living polymerization; Block copolymers

Abstract :

[en] Well‐defined AB(BA), ABA, and BAB block copolymers of tert‐butyl methacrylate (tBMA) (A) and ethylene oxide (EO) (B) have been prepared by sequential living anionic polymerization of the two comonomers, irrespective of their addition order. Diphenyl methyl potassium and naphthalene potassium have been successfully used as mono‐ and difunctional initiators, respectively. In all cases, molecular weight and composition of the block copolymers can be predicted on the basis of the monomer over initiator molar ratio, and the molecular weight distribution is relatively narrow. Size exclusion chromatography, selective extractions of homopolymers, and 1H‐ and 13C‐NMR spectroscopy support that block copolymerization proceeds without homopolymer formation nor side reactions, e.g., transesterification reactions. The PtBMA blocks have been quantitatively hydrolyzed into polyacid ones with formation of polyacid‐b‐polyether block copolymers as supported by titration, 1H‐NMR, and IR analysis. © 1992 John Wiley & Sons, Inc. Copyright © 1992 John Wiley & Sons, Inc.

Disciplines :

Chemistry

Author, co-author :

Wang, J.; Laboratory of Macromolecular Chemistry and Organic Catalysis, University of Liège, Sart Tilman (B6), Liege, B-4000, Belgium

Varshney, S. K.; Laboratory of Macromolecular Chemistry and Organic Catalysis, University of Liège, Sart Tilman (B6), Liege, B-4000, Belgium

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

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

Language :

English

Title :

Synthesis of AB(BA), ABA and BAB block copolymers of tert‐butyl methacrylate (A) and ethylene oxide (B)

Publication date :

1992

Journal title :

Journal of Polymer Science. Part A, Polymer Chemistry

ISSN :

0887-624X

eISSN :

1099-0518

Publisher :

John Wiley & Sons, Hoboken, United States - New Jersey

Volume :

Issue :

Pages :

2251-2261

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 05 January 2020

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