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Issue 16, 2011
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Tailoring the morphology of branched poly(N-isopropylacrylamide)via self-condensing atom-transfer radical copolymerization and its unique self-assembly behavior in alcohol

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Abstract

Highly branched poly(N-isopropylacrylamide) (PNIPAM) was first synthesized by self-condensing atom transfer radical copolymerization (SCATRCP) catalyzed by CuBr/tris[2-(dimethylamino)ethyl]amine (Me6TREN) complex in isopropanol at room temperature. This method showed good control over chain morphology and lower critical solution temperature (LCST) type phase transition behavior of PNIPAM by varying reaction time and monomer/inimer feed ratios. On the basis of GPC, FTIR, 1HNMR and DSC results, four stages were discerned during the polymerization procedure, at which chain architectures experienced “linear – comblike – slightly branched – highly branched” transformations. Additionally, the synthesized highly branched PNIPAM chains were found to be able to self-assemble into hollow spheres in alcohols such as methanol and ethanol, which arise from the presence of large amounts of hydrophobic branched points inside polymer chains.

Graphical abstract: Tailoring the morphology of branched poly(N-isopropylacrylamide)via self-condensing atom-transfer radical copolymerization and its unique self-assembly behavior in alcohol

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Publication details

The article was received on 16 Mar 2011, accepted on 02 Jun 2011 and first published on 07 Jul 2011


Article type: Paper
DOI: 10.1039/C1SM05459G
Citation: Soft Matter, 2011,7, 7526-7531
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    Tailoring the morphology of branched poly(N-isopropylacrylamide)via self-condensing atom-transfer radical copolymerization and its unique self-assembly behavior in alcohol

    S. Sun and P. Wu, Soft Matter, 2011, 7, 7526
    DOI: 10.1039/C1SM05459G

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