ATNRC and SET-NRC Synthesis of PtBA-g-PEO Weil-Defined Amphiphilic Graft Copolymers

A series of new well-defined amphiphilic graft copolymers containing hydrophobic poly(tert-butyl acrylate) backbone and hydrophilic poly(ethylene oxide) side chains were reported. Reversible addition-fragmentation chain transfer homopolymerization of tert-butyl 2-((2-bromopropanoyloxy)-methyl)acryla...

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Bibliographic Details
Published in:Journal of polymer science. Part A, Polymer chemistry Polymer chemistry, 2012-05, Vol.50 (10), p.1890-1899
Main Authors: Li, Yaogong, Du, Ming, Zhang, Yaqin, Li, Yongjun, Sui, Long, Lu, Guolin, Huang, Xiaoyu
Format: Article
Language:English
Subjects:
Backbone
Chain transfer
Coupling (molecular)
Fluorescence
Graft copolymers
Oxides
Radicals
Single electrons
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Summary:A series of new well-defined amphiphilic graft copolymers containing hydrophobic poly(tert-butyl acrylate) backbone and hydrophilic poly(ethylene oxide) side chains were reported. Reversible addition-fragmentation chain transfer homopolymerization of tert-butyl 2-((2-bromopropanoyloxy)-methyl)acrylate was first performed to afford a well-defined backbone with a narrow molecular weight distribution (M(w)/M(n) =1.07). The target poly(tert-butyl acrylate)-g-poly(ethylene oxide) (PtBA-g-PEO) graft copolymers with low polydispersities (M(w)/M(n)=1.18-1.26) were then synthesized by atom transfer nitroxide radical coupling or single electron transfer-nitroxide radical coupling reaction using CuBr(Cu)/PMDETA as catalytic system. Fluorescence probe technique was employed to determine the critical micelle concentrations (cmc) of the obtained amphiphilic graft copolymers in aqueous media. Furthermore, PAA-g-PEO graft copolymers were obtained by selective acidic hydrolysis of hydrophobic PtBA backbone while PEO side chains kept inert.
ISSN:0887-624X
DOI:10.1002/pola.25958