| 摘要 |
PURPOSE:To obtain the titled novel fiber with high knot strength, outstanding in heat and chemical resistances and flexibility, by treating polyphenylene sulfide fiber with an organic peracid to modify its structural unit. CONSTITUTION:Polyphenylene sulfide fiber consisting of structural unit of formula I is treated with an organic peracid (pref. peracetic acid) to modify >=30mol.% of said structural unit into structural unit of formula II (Y is 1 or 2), thus obtaining the objective fiber constituted of structural unit of formula III (X is 0, 1 or 2) with the structural unit of the formula II accounting for >=30% of said unit of formula III. The polyphenylene sulfide is preferable prepared by reaction, in an amide-based high-boiling polar solvent, between sodium sulfide and p-dichlorobenzene. Said polyphenylene sulfide fiber is pref. ultra-fine one, being produced by fiber formation through such a process as to eliminate the sea-component from the original sea-island type conjugate fiber. |
