WATER-RETENTION VALUES OF GRAFTED CELLULOSE WITH ACRYLAMIDE

Water retention values of cotton linters and viscose wood pulp treated with different concentrations of sodium hydroxide, in the pretreatmen t step during xanthation, are studied. The effect of graft copolymeriz ation of acrylamide onto cotton linters and viscose wood pulp by using xanthate method on water retention values is illustrated. The obtaine d results show that a lower concentration of sodium hydroxide has a sl ight effect on water retention values. It is found also that water ret ention values are affected not only by the crystallinity of cellulose but also by the polymer loading and graft yield. Water retention value s of grafted wood pulp possess higher values than grafted cotton linte rs.