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Issue 2, 2014
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Photo-induced cobalt-mediated radical polymerization of vinyl acetate

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Well-controlled poly(vinyl acetate) (PVAc) was successfully synthesized by photo-induced cobalt-mediated radical polymerization using (2,4,6-trimethylbenzoyl) diphenylphosphine oxide (TPO), which is commercially available, cheap, easy to store and has a high initiation efficiency, as the initiator in the presence of Co(acac)2 under UV irradiation (65 μW cm−2 at 365 nm) at 30 °C. The polymerization showed characteristics of living polymerization behaviors, such as linear kinetics, the molecular weight of the polymers linearly increasing with conversion, and the obtained polymers had a narrow molecular weight distribution. The polymerization can reach high conversions with a controlled manner (>80%, polymers with a molecular weight distribution in the range of 1.1–1.4) after a short induction time. Polymers with molecular weights as high as 120 000 g mol−1, with a narrow molecular weight distribution, were obtained. The mechanism of the polymerization was proposed based on the polymerization behavior and polymer structure.

Graphical abstract: Photo-induced cobalt-mediated radical polymerization of vinyl acetate

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The article was received on 11 Jul 2013, accepted on 23 Aug 2013 and first published on 28 Aug 2013

Article type: Paper
DOI: 10.1039/C3PY00913K
Citation: Polym. Chem., 2014,5, 551-557

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    Photo-induced cobalt-mediated radical polymerization of vinyl acetate

    X. Miao, W. Zhu, Z. Zhang, W. Zhang, X. Zhu and J. Zhu, Polym. Chem., 2014, 5, 551
    DOI: 10.1039/C3PY00913K

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