ポリプロピレン繊維の化学処理と染色性(I) (酸処理について)

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Polypropylene has no sites on which dyestuff can be attached, because it has no polar groups as those found in other fibers Then, a lot of study was reported about a chemical modification with some acidic reagents. In this paper, we have examined the gas-phase and liquid-phase treatment of polypropylene fiber and film with well known acidic reagents, and found the origin of dyeability increased after the pretreatment by means of elementary analysis or infrared spectral analysls. Results were :　1 R-SO_3H group was combined to the polypropylene molecule on the gas-phase treatment with sulfuric acid, fuming and chloro-sulfonic acid. These reacted fiber and film were well dyed with basic and cationic dyes and the washfast of them was fair good.　2 On the gas-phase and liquid-phase treatment with nitric acid, nitrogen atom was not found in the treated fiber and film, but they were also well dyed with same dyes. A colour of fiber dyed with Chrysoidine after the pretreatment was red-orange, which was seen on a salt formed between acid and Chrysoidine, and a treated fiber dyed hardly after drying for 4 hours at 60℃ or bolling in aqueous soutions. From these facts, it was assumed that a small amount of acid had penetrated into the fiber and made a salt with chrysoidine.　3 Cl atom was certified in the fiber after the treatment with a mixed solution of hydrochloric acid and sodium hypochlorite, and the treated fiber was dyed in red-orange with Chrysoidine. The origin of this increased dyeability would not be caused by a combined Cl atom, but a small amount of acid penetrated into the fiber, because the decrease of dyeability by the aftertreatment was the same on the case of nitlic acid.
山形大学の論文
1966-01-14

ポリプロピレン繊維の化学処理と染色性(I) (酸処理について)

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