A well-defined block copolymer synthesis via living cationic polymerization and nitroxide-mediated polymerization using carboxylic acid-based alkoxyamines as a dual initiatorReportar como inadecuado




A well-defined block copolymer synthesis via living cationic polymerization and nitroxide-mediated polymerization using carboxylic acid-based alkoxyamines as a dual initiator - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 ICR - Institut de Chimie Radicalaire

Abstract : A series of carboxylic acid-based alkoxyamines associated with SnBr4, a Lewis acid, have been used as protonic acids of a binary initiating system to control the cationic polymerization of vinyl ether. The living character of the homopolymerization of isobutyl vinyl ether was investigated under various conditions solvent, amount of catalyst, initiator structure etc

Among the different studied dual initiators, TEMPO based-alkoxyamine showed high efficiency to lead the polymerization of isobutyl vinyl ether IBVE in a controlled manner. The prepared polymers exhibited high TEMPO functionality \textgreater 0.85 and low dispersity 1.2 which is essential for the synthesis of well-defined block copolymers thereafter. TEMPO-functionalized PIBVE was used as a macro-initiator controller in the nitroxide-mediated polymerization NMP of styrene at 130 degrees C leading successfully to well-defined block copolymers of polyisobutyl vinyl ether-b-polystyrene PIBVE-b-PS with a narrow dispersity 1.2.

Keywords : synthesis polymerization





Autor: Dao Le - Trang N. T. Phan - Laurent Autissier - Laurence Charles - Didier Gigmes -

Fuente: https://hal.archives-ouvertes.fr/



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