摘要 |
The invention relates to a method of preparing omni-meta aromatic polysulfonamide fiber which comprises three steps of preparing spinning dope, wet spinning and post treating. The said step of preparing spinning dope comprises the following steps: (1) dissolving 3,3'-diaminodiphenyl sulphone in a polar organic solvent and cooling it to -20~20 °C ; (2) adding m-phthaloyl chloride of the same mole of the 3,3'-diaminodiphenyl sulphone to carry out a polymerization reaction; (3) then adding an inorganic base of the same mole of 3,3'-diaminodiphenyl sulphone to neutralize the hydrogen chloride produced during the polymerization reaction. The spinning dope thus prepared has a polymer solid content of 10%-20%. The fiber prepared according to the method in the present invention has a greatly improved crimpability, and evidently increased elongation at break comparing with the conventional aromatic polysulfonamide fiber, so that the spinnability of resultant yarn is improved.
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申请人 |
SHANGHAI TANLON FIBER CO., LTD. |
发明人 |
WANG, XIAOFENG;LI, JUN;YUAN, RONGHUA;WANG, HAIFENG;LU, SHUNXING;CHEN, SHENGHUI;CHANG, JICHENG;SONG, QINGRONG |