抄録
Cotton fabric and fabric from viscose rayon filament imbibing K2S2O8 and H2O2 were heated with vinyl acetate emulsions containing various emulsifiers in sealed tubes. The effects of various factors such as kinds and concentration of catalysts and emulsifiers, temperature, time and atmosphere of heating on the grafting were examined.
The grafting to rayon proceeded smoothly when emulsions contain non-ionic emulsifiers, namely polyethylene glycol oleate and laurate, but no desirable results were obtained when emulsions contain cationic or anionic emulsifiers. In contrast to the grafting with pure vinyl acetate, H2O2 is more effective than K2S2O8. The grafting to cotton is generally difficult; vinyl acetate differs. considerably from styrene in this point. A similar relationship to the grafting of styrene emulsions was found between the degree of grafting to rayon and the rate of homopolymerization of vinyl acetate emulsions. The results may be interpreted from the view points of the homopolymerization rate, penetration of monomers into fibers and chain transfer of catalysts.
