三叶异形聚酯共混纤维的碱水解性能

Alkaline treatment and hydrolysis properties of blend trilobal PET fiber

将PET与易水解聚酯(EHDPET)质量比80：20的三叶异形共混纤维进行碱(NaOH)水解处理,探讨了NaOH浓度、渗透剂浓度、水解时间等影响因素。结果表明：渗透剂浓度对共混纤维碱减量率的影响最大,其次分别是NaOH浓度、水解时间、处理温度。其中渗透剂浓度约0．05g/L较好,最大碱减量率应控制小于25%。电子显微镜照片表明随着碱减量率增加共混纤维表面微沟槽逐渐加深,三叶逐渐破裂分离。

Polyethylene terephthalate （PET） and easy hydrolysis degradable polyester （EHDPET） blend trilobal fiber was prepared in the mass ratio of 80 ： 20 and was subjected to alkaline treatment and hydrolysis in NaOH solution. The influential factors, including NaOH concentration, penetrant concentration and hydrolysis time, were studied. The result showed that the concentration of the penetrant had the greatest influence on the base deweighting rate of the blend fiber, and the subsequent order of these influential factors was determined as NaOH concentration,hydrolysis time and treating time according to their effect on base deweighting rate. The rational penetrant concentration should be controlled at 0.05 g/L. The SEM pholographs showed that the microgroove depth on the surface of blend fiber was increased and the three leaves separated gradually while raising the base deweighting rate. The maximum of the base deweighting rate should be controlled below 25%.