聚丙烯/易水解聚酯共混纤维的碱处理

THE ALKALINE HYDROLYSIS OF PP/EHDPET BLEND FIBERS

讨论了易水解聚酯(EHDPET)的水解机理,考察了温度、碱浓度、相容剂含量、共混比例以及甲醇钠等因素对PP/EHDPET 共混体系碱水解过程的影响。同时利用电子显微镜(SEM )观察了碱处理过程中共混纤维表面形态的变化。结果表明,提高反应温度、碱浓度、EHDPET 用量,减少相容剂添加量,均可提高碱水解速率。

Both the kinetics of alkaline hydrolysis of EHDPET and the effect of temperature, alkali concentration, bulk ratio and the content of polypropylene grafted maleic anhydride (PP\|g\|MAH) on the alkaline hydrolysis process were discussed. Meanwhile, the morphological change of the outer surface of blend fibers during this process was also investigated with scanning electron microscope (SEM). The result showed that increasing temperature, alkali concentration and EHDPET ratio and decreasing the addition of compatible agent could accelerate alkaline hydrolysis and decrease base deweighting.