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Backbone-Degradable Polymers via Radical Copolymerizations of Pentafluorophenyl Methacrylate with Cyclic Ketene Acetal: Pendant Modification and Efficient Degradation by Alternating-Rich Sequence
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    Backbone-Degradable Polymers via Radical Copolymerizations of Pentafluorophenyl Methacrylate with Cyclic Ketene Acetal: Pendant Modification and Efficient Degradation by Alternating-Rich Sequence
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    ACS Macro Letters

    Cite this: ACS Macro Lett. 2021, 10, 10, 1223–1228
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    https://doi.org/10.1021/acsmacrolett.1c00513
    Published September 23, 2021
    Copyright © 2021 American Chemical Society

    Abstract

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    This work deals with syntheses of backbone-degradable polymers via the radical copolymerization of pentafluorophenyl methacrylate (PFMA) with 5,6-benzo-2-methylene-1,3-dioxepane (BMDO), which undergoes ring-opening propagation to afford an ester-bonded backbone. The combination of the electron-deficient methacrylate with the electron-rich cyclic monomer allowed high crossover copolymerization, and the electronic effect was clarified by the comparison with the copolymerization of methyl methacrylate (MMA) and BMDO. The PFMA units of the resultant copolymer underwent quantitative alcoholysis or aminolysis transformation into methacrylate or methacrylamide units along with the pendant functionalization. The alternating-rich sequence was achieved by feeding an excess ratio of BMDO, which was supported by MALDI-TOF-MS of the copolymer obtained by the RAFT copolymerization. The methanolysis-transformed copolymer carrying MMA units was decomposed under basic condition, and the degradation efficiency was superior to that of the copolymer obtained via radical copolymerization of MMA with BMDO because of the alternating-rich sequence.

    Copyright © 2021 American Chemical Society

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    • Experimental details, protocols for polymerizations, PPM, and degradation, and additional results including with other alcohols and amine (PDF)

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    Cited By

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    This article is cited by 18 publications.

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    ACS Macro Letters

    Cite this: ACS Macro Lett. 2021, 10, 10, 1223–1228
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsmacrolett.1c00513
    Published September 23, 2021
    Copyright © 2021 American Chemical Society

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