Graft Copolymerization of Acrylamide onto Gel-Cellophane by Ceric Ion Method

III. Effects of Model Compounds of Cellulose and e-value of Monomer on the Reaction Behavior

Abstract

The effects of model compounds of cellulose were studied on the AM monomer conversion during the reaction.
The model compounds used here were alcohol (n-butanol, propylene glycol), monosaccharide (β-glucose), disaccharide (saccharose) and polysaccharide (starch).
In the case of starch and cellulose, the AM monomer conversion increased with the storage time of “Ce^IV-AM-HNO₃” system, but the opposite results were obtained in the case of other compounds.
From these results, this grafting mechanism was presumed to be not understood as the usual mechanism by OH group or the dependency of homogeneous or heterogeneous system.
Further, the effects of e-value of monomer were studied on the grafting.
In the case of monomers such as acrylamide and acrylonitrile having the higher e-value, the grafting reactivity against the storage time of “Ce^IV-monomer-HNO₃” system was prolonged and [Ce^IV-monomer] complex was found to be formed easily. In the case of monomer such as N-vinylpyrrolidene having lower e-value, the graft copolymerization and the formation of complex were not detected.
On the basis of the results obtained here and the results in the previous papers of this series, the grafting mechanism was presumed to be affected by the reactivity of [Ce^IV-monomer] complex.