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Issue 23, 2018
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Thermo-reversible self-healing in a fluorous crosslinked copolymer

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Thermo-reversible self-healing of a partially fluorinated crosslinked polymer was achieved by utilizing reversible Diels–Alder (DA) chemistry. Copolymers (PHFBA-co-PFMA) of perfluorobutyl acrylate (HFBA) and furfurylmethacrylate (FMA) with controlled stoichiometric ratios were synthesized by microwave-assisted radical polymerization by controlling the individual components. The microstructures and stoichiometries of these copolymers of PHFBA and PFMA were analyzed by 1H, 19F, 13C, and DOSY NMR spectroscopy and their molecular weights were analyzed by GPC. The glass transitions (Tg) of the different stoichiometric copolymers correlate well with the estimated Tg values from the Fox equation. A thermo-reversible crosslinked polymer network was achieved via Diels–Alder (DA) and retro-DA reactions between the furan moiety of the copolymer (PHFBA-co-PFMA) and bismaleimide; the self-healing ability of this network was investigated using 1H NMR, DSC and solution experiments. The self-healing process and recovery of the crosslinked polymers was screened by microscopic visualization and stress–strain tensile studies. The surface properties of the fluorous copolymers and crosslinked polymers were studied by water contact angle measurements, and their mechanical properties were investigated by nanoindentation and DMA.

Graphical abstract: Thermo-reversible self-healing in a fluorous crosslinked copolymer

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The article was received on 25 Mar 2018, accepted on 13 May 2018 and first published on 14 May 2018

Article type: Paper
DOI: 10.1039/C8PY00471D
Citation: Polym. Chem., 2018,9, 3248-3261
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    Thermo-reversible self-healing in a fluorous crosslinked copolymer

    A. K. Padhan and D. Mandal, Polym. Chem., 2018, 9, 3248
    DOI: 10.1039/C8PY00471D

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