抄録
Cotton fabric, fabric from viscose rayon filament and crimped viscose rayon staple fibers imbibing aqueous solutions of K2S2O8, (NH4)2S2O8 and H2O2 or methanol solutions of α, α'-azo-bisisobutyronitrile and benzoyl peroxide were heated with vinyl acetate in sealed tubes. The effects of various factors such as compositions of imbibing solutions, quantities of vinyl acetate, temperature, time and atmosphere of heating on the grafting were examined. K2S2O8 and (NH4)2S2O8 are more effective than the other catalysts. The higher the concentration of catalysts and the temperature of heating, the higher the rate and the efficiency of the grafting. Such behaviors differ considerably from those of grafting of styrene. Grafting to rayons were easier than to cotton. The degree of grafting of about 140% was obtained under suitable conditions.
Dry cellulose fibers imbibing, catalysts were also heated with vinyl acetate-organic solvent mixtures. Methanol, acetic acid, petroleum benzine and ligroin were used as solvents, but no desirable results were obtained. The secondary grafting of vinyl acetate to dry vinyl acetate grafted cellulose fiberes imbibing K2S2O8 was also examined, but the grafting proceeded slightly in the absence of water. Vinyl acetate markedly differs from styrene in these points.
