Abstract
A radical copolymerization behavior of limonene oxide and methylacrylate was investigated, by which a partially biobased polymer-bearing reactive epoxy groups in the side chains was obtained in 43 % yield in the maximum. Degree of LO incorporation into the copolymer was determined to be 34–37 % when 5.0 mol % of 2,2′-azobis(isobutyronitrile) was employed, despite initial feed ratios. Reactivity of the epoxy groups in the side chains was investigated by two different methods. One is ring-opening of the epoxy groups with benzyl thiol, giving the corresponding polymer with β-hydroxyl sulfide moieties in 95 % yield. Another one is hydrolyzation of the epoxy groups in HCl aqueous solution at room temperature, providing a quantitative formation of the dihydroxyl groups in the side chains.
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This work was partly supported by grants from the Circle for the Promotion of Science and Engineering, and from Kogin Regional Economy Promotion Foundation.
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Morinaga, H., Kiyokawa, Y., Kataoka, M. et al. Synthesis of partially biobased polymer-bearing reactive epoxy groups in the side chains by radical copolymerization of limonene oxide with methyl acrylate. Polym. Bull. 70, 1113–1123 (2013). https://doi.org/10.1007/s00289-012-0890-z
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DOI: https://doi.org/10.1007/s00289-012-0890-z