【摘要】 将乙二醇(EG)、对苯二甲酸二甲酯(DMT)和3,5-二甲酸苯磺酸钠(SIPM)进行共聚。共聚酯或共聚酯/PET共混后熔融纺成中空纤维,最后再经NaOH溶液处理。可得高吸水纤维。本文通过扫描电镜(SEM)、X光衍射(WAXD)、差示扫描量热法(DSC)、保水等测定,研究了该改性聚酯在碱处理时的成孔机理。研究结果表明,共聚酯纤维碱处理后在纤维上留下圆形孔洞而共聚酯/聚酯共混后纺制的纤维经碱处理后的孔洞形状由SIPM的加入量、共混比和粘度等决定。孔形可为长径比不同的椭圆形或细槽形。更多还原

【Abstract】 EG,DMT and sodium-5-sulfoisophthalate(SIPM) of weight from 3—15％ were copolymerized and/or blended with PET of weight from 0—75％ and melt processed into hollow fiber. The fiber was then treated with NaOH solution. There remained a grea(?) number of interconnected microvoids of size about 3—6μm or very fine grooves of length/radius ratio (L/R) from 5—200 both at the fiber surface and the internal surface of the hollow fiber. The fiber resulted are highly water retentable.The mechanism of voids formation of modified PET fiber in NaOH solution, the relation between the treatment conditions and fiber weight losses, the relation between the voids morphology and the materials used and water retention were studied by using Scanning Electron Microscope (SEM), X-ray Diffraction method(WAXD), Differencial Scanning Calorimeter (DSC) and water retention determination.The results showed that the alkali treatment of copolyester fiber produced spheri(?) voids on it, while for copolyeser/PET blent fiber the voids morphology depended upon the system viscosity, the amount of SIPM added and the blend ratio and the voids formed may be of different L/R ratios.更多还原