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Issue 1, 2016
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Pentablock star shaped polymers in less than 90 minutes via aqueous SET-LRP

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Abstract

The synthesis of multi-block star-shaped copolymers via SET-LRP in aqueous solution has been reported for the first time. This aqueous polymerization technique allows rapid and direct access to acrylamide based star-shaped polymers. It is possible to synthesize an A-B-A-B-C penta-block copolymer in <90 minutes in total. To achieve this, we have investigated a water-soluble 3-arm initiator based on a glycerol structure for the first time. Using N-isopropylacrylamide 3-arm star-shaped polymers were prepared with DP = 60 to 240 with full conversions in <30 minutes with polydispersities <1.11. The scope of the reaction was demonstrated by synthesizing diblock copolymers using a combination of NIPAM, DMA and HEAm in different ratios. In addition a sequence controlled 3-arm pentablock copolymer has been obtained with excellent control over molecular weight distribution (PDI < 1.14) as evidenced by GPC, 1H NMR, and MALDI-TOF MS.

Graphical abstract: Pentablock star shaped polymers in less than 90 minutes via aqueous SET-LRP

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Publication details

The article was received on 07 Oct 2015, accepted on 16 Oct 2015 and first published on 19 Oct 2015


Article type: Paper
DOI: 10.1039/C5PY01623A
Citation: Polym. Chem., 2016,7, 171-175
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    Pentablock star shaped polymers in less than 90 minutes via aqueous SET-LRP

    R. Aksakal, M. Resmini and C. R. Becer, Polym. Chem., 2016, 7, 171
    DOI: 10.1039/C5PY01623A

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