Abstract 1) Starch was oxidized with ozone in a medium of water or carbon tetrachloride to yield per-oxidized starch (abbreviated as oxistarch-W or oxi-starch-C). 2) The stabilities of the peroxide-group of oxi-starchs were measured. 3) In the present of oxi-starch, polymerizations of methyl methacrylate (MMA), acrylonitrile (AN) and vinyl chloride were carried out. Graft copolymers of starch with vinyl polymers were obtained. Their properties were described. 4) It was confirmed that commercial starch, dialdehyde starch oxidized with periodic acid, starch treated with potassium iodide, and commercial maltose could also initiate the polymerization of methyl acrylate, yielding graft copolymers and vinyl homo-polymers.
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Kimura et al. (1962) studied this question.
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