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ATRP synthesis of polyallene-based amphiphilic triblock copolymer

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Abstract

A series of ABA triblock copolymers, comprising double-bond-containing poly(phenoxyallene) (PPOA) and poly(methoxymethyl methacrylate) (PMOMMA) segments, was synthesized by a combination of conventional free radical polymerization, atom transfer radical polymerization (ATRP) and the site transformation strategy. A new bifunctional initiator containing azo and Br-containing ATRP initiating groups was employed to initiate the conventional free radical homopolymerization of phenoxyallene with a cumulated double bond to give a PPOA-based macroinitiator (Br-PPOA-Br) bearing ATRP initiating groups at both ends. Next, ATRP of MOMMA was initiated by Br-PPOA-Br macroinitiator to produce PMOMMA-b-PPOA-b-PMOMMA triblock copolymers, which were subsequently hydrolyzed to afford PMAA-b-PPOA-b-PMAA amphiphilic triblock copolymers. The critical micelle concentration (cmc) of PMAA-b-PPOA-b-PMAA amphiphilic triblock copolymer in aqueous solution was determined by fluorescence probe technique and the dependence of cmc on pH was also investigated. These amphiphilic triblock copolymers self-assembled into wormlike and large compound micelles in aqueous media.

Graphical abstract: ATRP synthesis of polyallene-based amphiphilic triblock copolymer

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Publication details

The article was received on 29 Sep 2017, accepted on 30 Oct 2017 and first published on 30 Oct 2017


Article type: Paper
DOI: 10.1039/C7PY01666B
Citation: Polym. Chem., 2017, Advance Article
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    ATRP synthesis of polyallene-based amphiphilic triblock copolymer

    A. Ding, G. Lu, H. Guo and X. Huang, Polym. Chem., 2017, Advance Article , DOI: 10.1039/C7PY01666B

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