Synthesis of the four‐arm star‐block copolymer [PVC‐b‐PBA‐CH(CH3)?CO?O?CH2]4C by SET‐DTLRP initiated from a tetrafunctional initiator |
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Authors: | Virgil Percec Monika J Sienkowska |
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Institution: | Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104‐6323 |
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Abstract: | Pentaerythritol tetrakis(2‐iodopropionate) was used as a tetrafunctional initiator for the Na2S2O4 catalyzed SET‐DTLRP of n‐butyl acrylate in water at room temperature. The resulting tetrafunctional poly(n‐butyl acrylate) macroinitiator with Mn = 14,864 or Mn = 3627 per arm was used to initiate the SET‐DTLRP of vinyl chloride and provide the first examples of four‐arm star‐block copolymers PVC‐b‐PBA‐CH(CH3)? CO? O? CH2]4C. The Mn of the PVC segment from each arm of the four‐arm star‐block copolymer varied between 353 and 33,622. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 628–634, 2009 |
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Keywords: | block copolymer four‐arm star PVC SET‐DTLRP tetrafunctional initiator VC |
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