Methacryloyl and/or Hydroxyl End-Functional Star Polymers Synthesized by ATRP Using the Arm-First Method

Authors

  • Shigeki Ohno,

    1. Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA
    2. Current address: Kaneka Corporation, 5-1-1 Torikai-nishi, Settsu, Osaka Japan
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  • Haifeng Gao,

    1. Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA
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  • Brian Cusick,

    1. Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA
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  • Tomasz Kowalewski,

    1. Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA
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  • Krzysztof Matyjaszewski

    Corresponding author
    1. Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA
    • Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, USA.
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Abstract

Star polymers with methacryloyl groups at the chain ends were synthesized by esterification of hydroxyl end-functional star polymers. First, the linear hetero-telechelic macroinitiator (MI) was prepared by ATRP using a functional initiator. The obtained MI was chain-extended and cross-linked with DVB and then esterified into methacryloyl chain-end functionality. The degree of esterification was controlled by changing the initial molar ratios of methacryloyl chloride to hydroxyl groups. The methacryloyl-containing star polymers were cross-linked either intermolecularly or intramolecularly under heating or UV irradiations, depending on the concentrations of star polymers during the cross-linking reactions.

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