Abstract
AbstractThe decomposition of hydrogen peroxide and the graft copolymerization of methyl methacrylate has been investigated by use of cellulose samples adsorbing various metallicions. Metallic ions generally accelerate the decomposition of hydrogen peroxide, increase the number of grafts, and lower the average molecular weight. However their effects are much influenced by the range of pH values. It is clear that the amount of grafts formed is not necessarily proportional to the amount of decomposed hydrogen peroxide and is dependent upon a function peculiar to each metallic ion. The effective metallic ions in the neutral system were Cu2+, Ag+, Fe2+, Co2+, Cr3+, and Zn2+. The effects of Ce3+, Mg2+, Hg3+, Cd2+, Ni2+ and Mn2+ were either negligible or negative. Comparative studies on various conditions confirmed that Fe2+ in the neutral system gives graft copolymer having a minimum average molecular weight and the greatest number of grafts.
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