Journal
DESIGNED MONOMERS AND POLYMERS
Volume 17, Issue 2, Pages 132-139Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/15685551.2013.840479
Keywords
8-shaped polymers; cyclization; click; synthesis
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Funding
- Key project of Education Department of Hunan Province [12A134]
- Department of Science and Technology of Hunan Province Project [2012FJ4094, 2013FJ3035]
- Open Project Program of Key Laboratory of Advanced Functional Polymeric Materials of Hunan Province [12K050]
- High-tech Project of Development and Reform Commission of Hunan Province
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A series of well-defined 8-shaped polymers have been synthesized by the combination of reversible addition-fragmentation chain transfer (RAFT) polymerization and click reaction. Firstly, well-defined, azide-terminated, four-armed star polymers including poly(N,N-dimethylacrylamide) and polystyrene were prepared by RAFT polymerization using pentaerythritoltetrakis(3-(S-(2-azidoethylcarbonoyl)trithiocarbonyl)propanoate) as a chain transfer agent. Then, intramolecular cyclization of the azide-functionalized four-armed precursors was conducted under highly dilution conditions using a bifunctional N,N-bis(2-propargyloxycarbonyl ethyl)-2-hydroxylethyl amine as the linker, affording 8-shaped polymers. FTIR, H-1 NMR, GPC, and MLADI-TOF MS analysis confirmed that the coupling reaction proceeded via the cyclization manner.
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