Graft copolymerization of vinylacetate on secondary fibre cellulosic.

Graft copolymers of vinylacetate on secondary cellulosic fiber were prepare d by the use of iron(II)-hydrogen peroxide redox system as initiator, in aq ueous medium. The graft copolymers were characterized by FT-IR spectroscopy , scanning electron microscopy, and thermogravimetric analysis. The following parameters of the copolymerization reaction were studied: cel lulose: vinylacetate reagents ratio, concentration Fe+2-H2O2, pH, temperatu re and time of reaction. Their effects on the system are also discussed. Th e grafting percent higher than 100% were obtained in the best condition of reation, with a heterogeneous distribution of synthetic polymer over the fi ber surface.