Abstract
The anionic graft polymerization of vinyl monomers on epoxy-activated cellulose (CGE) was carried out in the presence of tertiary amine in dimethyl sulfoxide. The polymerizability of the monomers was in the order, methyl vinyl ketone (MVK)>acrylonitrile (AN)>methacrylonitrile (MAN)>methyl methacrylate (MMA), when the polymerization was carried out with triethylenediamine (TEM)/butyl glycidyl ether complex as an initiator. MVK and AN were successfully polymerized by TEM/CGE complex leading to the formation of graft celluloses, whereas MAN and MMA were not polymerized, because of the low oxirane content of CGE. For the graft polymerization of MVK and AN on the cellulose, TEM was the most suitable tertiary amine among the amines tried for the preparation of graft cellulose with higher grafting. The highest grafting was obtained by the use of equimolar amounts of TEM and oxirane. The grafting remarkably increased with the increase in the dielectric constant of the solvent used and the monomer concentration. The effect of reaction temperature on the grafting was small, and the apparent activation energy of the polymerization of MVK and AN were 35.9 and 9.2kJ/mol, respectively.
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