抄録
Acrylonitrile (AN) and vinyl acetate (VAc), respectively, were grafted onto viscose rayon (MW=5.0×104) in vapor phase by using potassium persulphate as an initiator. Each graft product was refluxed in 10% aq NaOH for 2hr to yield the viscous solutions. The alkaline solution from the AN graft product was dialyzed for 100hr against running water by the use of cellophane tube as semipermeable membrane to yield the transparent dialyzate solution. The solution from the VAc graft product was neutralized and then dialyzed under the same conditions to produce the transparent dialyzate solution. IR spectra of the solutes of the dialyzate showed characteristic absorptions of both cellulose molecule and the hydrolyzed graft chains. Huggins constant determined for the water-soluble dialyzate from the VAc graft product was about six times that of the PVA sample obtained by hydrolyzing the trunk cellulose molecules. From these results, it may be concluded that water-soluble cellulose graft copolymers could be obtained by grafting hydrophylic vinyl monomers onto cellulose.
