Abstract
A method of grafting lignin was developed which allows water-soluble, cationic graft copolymers of lignin to be made. The reaction is a solution polymerization often run in aprotic, polar organic solvents. The cationic copolymers are made by conducting the reaction with dimethyldiprop-2-enylammonium chloride, (5-methyl-4-oxo-3-oxahex-5-enyl)trimethylammonium methyl sulfate or (5-methyl-4-oxo-3-oxahex-5-enyl)trimethyl ammonium chloride. The lignins grafted were obtained from pine by the kraft process.
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