Title

Vanadium(V) initiated graft co-polymerization of vinyl monomers onto poly(vinyl alcohol)

Abstract

The graft co-polymerization of vinyl monomers onto poly(vinyl alcohol) (PVA) by ammonium vanadate (AV) was studied as a function of H2O 2/AV mole ratio, PVA/monomer weight ratio, sulfuric acid concentration, and reaction time and temperature. The presence of hydrogen peroxide at 2 N H2SO4 improves the grafting efficiency of vanadium(V). The optimum time and temperature of the grafting reaction was found to be 3.5 h and 55°C respectively for the most reactive vinyl monomer studied. FT-IR spectroscopy was used for the confirmation of grafting. The thermal stability of the grafted polymer was evaluated. A generalized reaction scheme has been suggested to elucidate the role of vanadium(V) and hydrogen peroxide.

Publication Title

Journal of the Indian Chemical Society

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