| Abstract: | Grafting of acrylic monomers onto cellulose substrates in acid aqueous medium using complex of Mn3+ ions as a redox initiator is described. Assuming that the /Mn3+/ ions react with aldehydes and vicinal diols, the rate of these reactions has been measured spectroscopically. (ESR and visible light) using model compounds. It is concluded that the /Mn3+/ grafting onto cellulose is a radical reaction initiated mainly by oxidation of aldehydes at reducing end groups and C-C bond scission of vicinal diols at the end groups and along the cellulose chains. The initiation rates of the Ce4+, /Mn3+/ and VO22+ redox ions are related to their oxidation potential. |
