Copolymerization of α‐hydroxyisobutyric acid anhydrosulfite with vinyl compounds<sup>1</sup>

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<jats:title>Abstract</jats:title><jats:p>Polymerization of α‐hydroxyisobutyric acid anhydrosulfite was carried out in some vinyl compounds in the presence of azo‐bis‐isobutyronitrile at 80°C. In acrylonitrile, a graft copolymer consisting of polyacrylonitrile and polyester[OC(CH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub>CO]x̄chains was obtained. Free radical nature of the grafting reaction is suggested. In methacrylonitrile a polymeric product was formed with polymethacrylonitrile main chains in which the cyano groups partly reacted with one molecule of the anhydrosulfite, introducing the units of [OC(CH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub>CO] into the polymer.</jats:p>

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