In 200 ml ethanol the amount of 10 g of Na metal was dissolved. The excess of ethanol was
evaporated in vaccum. The remaining sodium ethoxide was solubilized into 200 ml of DMSO
under nitrogen, and 14 g of PVA was added. The mixture was stirred vigorously to give a
gelatinous product. The residual alcohol was removed under vaccum. The resulting sodium
polyvinyl alcoholate was dissolved in 200 ml DMSO and 26 ml of freshly distilled
chloroethanol was added. The mixture was stirred for 5 hours at 90 0C temperature. The
polymer solution was precipitated into methanol to give a florescent white solid