Micellar copolymerization of styrene with a poly(ethylene oxide) macromonomer in water to a unimolecular graft copolymer micelle

Micellar copolymerization of ω-methoxy-α-p-styrylheptyloxy-poly(ethylene oxide) (PEO) macromonomer, 1 (C 1 -PEO-C m -S-n, m = 7 and n = 18), with an equimolar amount of styrene solublized in the micelle has been conducted with 4,4′-azobis(4-cyanovaleric acid) (AVA) as a water-soluble initiator at 60...

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Bibliographic Details
Published inDesigned monomers and polymers Vol. 3; no. 3; pp. 255 - 261
Main Authors Maniruzzaman, Mohd, Kawaguchi, Seigou, Ito, Koichi
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.01.2000
Subjects
compartmentalized radical
living radical
Micellar copolymerization
poly(ethylene oxide) macromonomer
styrene
unimolecular copolymer micelle
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Summary:Micellar copolymerization of ω-methoxy-α-p-styrylheptyloxy-poly(ethylene oxide) (PEO) macromonomer, 1 (C 1 -PEO-C m -S-n, m = 7 and n = 18), with an equimolar amount of styrene solublized in the micelle has been conducted with 4,4′-azobis(4-cyanovaleric acid) (AVA) as a water-soluble initiator at 60°C. The copolymerization proceeded very rapidly, apparently transparently and azeotropically, to afford 'unimolecular particles' of 15 nm in radius and 7.4 × 10 6 in apparent molecular weight. The organized micellar copolymerization appears to be pseudo-living with highly limited terminations between the compartmentalized (isolated) propagating radicals. The molecular weight of the graft copolymers increased with conversion.
ISSN:1568-5551
1568-5551
DOI:10.1163/156855500750205547