The Trialkylborane-initiated Graft Copolymerization of Methyl Methacrylate onto Hemoglobin

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Abstract
The graft copolymerization of methyl methacrylate by trialkylborane onto hemoglobin has been studied at 37°C. In aqueous media, graft copolymers were obtained in the form of a light brown powder or granules, while no grafting occurred in organic solvents, such as cyclohexanone, n-hexane, tetrahydrofuran, and toluene. The presence of water seems to be essential to the grafting. The hydrogen peroxide-decomposing property of hemoglobin was well preserved in the graft copolymers so obtained. The mechanism of the initiation is discussed.