Comparative examinations of reactivity of grafted celluloses prepared by u.v.- and ceric salt-initiated graftings

✍ Scribed by Hitoshi Kubota; Shinya Suzuki

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 390 KB
• Volume: 31
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(95)00037-2

✦ Synopsis

Grafting of glycidyl methacrylate (GMA) and acrvlonitrile (AN) on cellulose was carried out in u.v.-and ceric salt (Ce4+)-initiation systems. The u.v.-initiation system using hydrogen peroxide as a photoinitiator was characterized with a considerably low grafting rate compared to the Ce4+-initiation system. The resultant GMA-and AN-grafted celluloses were subjected to reactions with triethylenetetramine (Trien) and hydroxylamine, respectively, to compare the reactivity between the grafted samples (u.v.-and Ce4+-samples) prepared in the u.v.-and Ce4+ -unttation systems. The u.v.-sample exhibited higher reactivity than the Ce'+ -sample toward each reaction. The samples containing Trien and amidoxime groups showed an ability to absorb cupric ion, which was nearly equal among the two samples. The difference in the reactivity between the two samples was discussed in terms of the structure of grafted cellulose, which was characterized with average molecular weight and number of grafted chains and moisture regain of the samples.