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Ceric salt‐initiated graft copolymerization of methyl methacrylate on preoxidized cellulose samples
Author(s) -
Ogiwara Yoshitaka,
Kubota Hitoshi
Publication year - 1973
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1973.070170809
Subject(s) - oxidizing agent , copolymer , reactivity (psychology) , cellulose , hydrogen peroxide , polymer chemistry , methyl methacrylate , chemistry , salt (chemistry) , nuclear chemistry , oxidized cellulose , organic chemistry , polymer , medicine , alternative medicine , pathology
The effects of preoxidation of cellulose samples on graft copolymerization in the presence of ceric salt (Ce 4+ ) as an initiator were investigated. The use of Ce 4+ as oxidizing agent inhibited the formation of grafts, and the number of grafts decreased as the concentration of Ce 4+ in the pretreatment rose. In contrast, the samples oxidized with periodic acid (HIO) 4 or hydrogen peroxide (H 2 O 2 ) tended to show improved initiation characteristics and gave a larger number of grafts than the unoxidized samples. The reactivity of oxidized samples toward Ce 4+ was examined and the following results were obtained: The part of easy reactivity decreased in the Ce 4+ ‐oxidized samples but it increased in the HIO 4 ‐oxidized samples; on the other hand, it did not vary greatly in the H 2 O 2 ‐oxidized samples. Cellulose is probably oxidized to different states by different oxidizing agents, and the reactivity of Ce 4+ toward these oxidized samples, as one index, seems to be reflected in the graft copolymerization. It was consequently recognized that the graft copolymerization characteristics of cellulose samples could be improved significantly by proper selection of oxidiation conditions.